DATASHEET
ISL9110, ISL9112
1.2A High Efficiency Buck-Boost Regulators
The
ISL9110
and
ISL9112
are highly-integrated buck-boost
switching regulators that accept input voltages either above or
below the regulated output voltage. Unlike other Buck-Boost
regulators, these regulators automatically transition between
operating modes without significant output disturbance.
Both parts are capable of delivering up to 1.2A output current,
and provide excellent efficiency due to their fully synchronous
4-switch architecture. No-load quiescent current of only 35µA
also optimizes efficiency under light-load conditions. Forced
PWM and/or synchronization to an external clock may also be
selected for noise sensitive applications.
The ISL9110 is designed for standalone applications and
supports 3.3V and 5V fixed output voltages or variable output
voltages with an external resistor divider. Output voltages as
low as 1V, or as high as 5.2V are supported using an external
resistor divider.
The ISL9112 supports a broader set of programmable features
that may be accessed using an I
2
C bus interface. With a
programmable output voltage range of 1.9V to 5V, the
ISL9112 is ideal for applications requiring dynamically
changing supply voltages. A programmable slew rate can be
selected to provide smooth transitions between output voltage
settings.
The ISL9110 and ISL9112 require only a single inductor and
very few external components. Power supply solution size is
minimized by a tiny 3mmx3mm package and a 2.5MHz
switching frequency, which further reduces the size of external
components.
FN7649
Rev.3.00
Jul 26, 2018
Features
• Accepts input voltages above or below regulated output
voltage
• Automatic and seamless transitions between Buck and
Boost modes
• Input voltage range: 1.8V to 5.5V
• Output current: Up to 1.2A
• High efficiency: Up to 95%
• 35µA quiescent current maximizes light-load efficiency
• 2.5MHz switching frequency minimizes external component
size
• Selectable Forced PWM mode and external synchronization
• I
2
C Interface (ISL9112)
• Fully protected for overcurrent, over-temperature, and
undervoltage
• Small 3mmx3mm TDFN Package
Applications
• Regulated 3.3V from a single Li-ion battery
• Smart phones and tablet computers
• Handheld devices
• Point-of-load regulators
Related Literature
For a full list of related documents, visit our website
•
ISL9110, ISL9112
product pages
V
IN
=
1.8V TO 5.5V
5
C
1
10µF
6
10
9
STATUS
OUTPUTS
8
7
ISL9110IRTNZ
PVIN
LX1
100
95
EFFICIENCY (%)
L1
2.2µH
90
V
IN
= 5V
85
80
75
V
IN
= 3V
V
IN
= 2.5V
VIN
MODE
EN
BAT
PG
GND
11
LX2
VOUT
1
V
OUT
=
3.3V/1A
C
2
10µF
FB
12
PGND
3
V
OUT
= 3.3V
70
0.01
0.05
I
OUT
(A)
0.25
1.25
FIGURE 2. EFFICIENCY
FIGURE 1. TYPICAL APPLICATION
FN7649 Rev.3.00
Jul 26, 2018
Page 1 of 21
ISL9110, ISL9112
Table of Contents
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table of Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Thermal Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Analog Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
I
2
C Interface Timing Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Typical Performance Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internal Supply and References. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Enable Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Soft Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
POR Sequence and Soft-start. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overcurrent Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Short-Circuit Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Undervoltage Lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PG Status Output (ISL9110 only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BAT Status Output (ISL9110 only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ultrasonic Mode (ISL9112 only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Buck-Boost Conversion Topology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PWM Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PFM Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation With VIN Close to VOUT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Voltage Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Digital Slew Rate Control (ISL9112 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Register Description (ISL9112) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I
2
C Serial Interface (ISL9112) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Protocol Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Write Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Read Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Applications Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Component Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Voltage Programming, Adj. Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Feed-Forward Capacitor Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Non-Adjustable Version FB Pin Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inductor Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PVIN and VOUT Capacitor Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Application Example 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Application Example 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Application Example 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended PCB Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The TDFN Package Requires Additional PCB Layout Rules for the Thermal Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General PowerPAD Design Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12
12
12
12
12
12
12
12
12
12
12
12
13
13
13
13
13
13
13
13
14
14
15
16
16
17
17
17
17
17
17
17
18
18
18
18
18
19
Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Package Outline Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
FN7649 Rev.3.00
Jul 26, 2018
Page 2 of 21
ISL9110, ISL9112
Block Diagram
LX1
4
PVIN
LX2
2
5
REVERSE
CURRENT
9
6
8
EN
V
REF
EN
1
GATE
DRIVERS
AND ANTI-
SHOOT THRU
SOFT
DISCHARGE
VOUT
EN
VIN
BAT
EN
3
PGND
PVIN
MONITOR
THERMAL
SHUTDOWN
MODE/SYNC
10
VOUT
CLAMP
PWM
CONTROL
CURRENT
DETECT
EN
7
SCL
SDA
7
8
I C
EN
EN
2
PG
VOUT
MONITOR
12 FB
EN
OSC
REF
ERROR
AMP
VOLTAGE
PROG.
11
GND
Pin Configurations
ISL9110
(12 LD TDFN)
TOP VIEW
VOUT 1
LX2 2
PGND 3
LX1 4
PVIN 5
VIN 6
ISL9110
PAD
12 FB
11 GND
10 MODE/SYNC
9 EN
8 BAT
7 PG
Pin Descriptions
PIN # ISL9110 ISL9112
1
2
3
4
5
6
7
12 FB
11 GND
DESCRIPTION
Buck/boost output. Connect a 10µF
capacitor to PGND.
Inductor connection, output side.
Power ground for high switching current.
Inductor connection, input side.
Power input. Range: 1.8V to 5.5V. Connect a
10µF capacitor to PGND.
Supply input. Range: 1.8V to 5.5V.
Open-drain output.
Provides output power-good status.
Logic input, I
2
C clock.
Open drain output.
Provides input-power-good status.
Logic I/O, open drain, I
2
C data.
Logic input, drive high to enable device.
VOUT
LX2
PGND
LX1
PVIN
VIN
PG
-
VOUT
LX2
PGND
LX1
PVIN
VIN
-
SCL
-
SDA
EN
ISL9112
(12 LD TDFN)
TOP VIEW
VOUT 1
LX2 2
PGND 3
LX1 4
PVIN 5
VIN 6
ISL9112
PAD
8
BAT
-
10 MODE/SYNC
9 EN
8 SDA
7 SCL
9
10
EN
MODE /
SYNC
MODE / Logic input, high for auto PFM mode. Low for
SYNC forced PWM operation.
External clock sync input. Range: 2.75MHz
to 3.25MHz.
GND
FB
PAD
Analog ground pin.
Voltage feedback pin.
Exposed pad; connect to PGND.
11
12
PAD
GND
FB
PAD
FN7649 Rev.3.00
Jul 26, 2018
Page 3 of 21
ISL9110, ISL9112
Ordering Information
PART NUMBER
(Notes
2, 3, 4)
ISL9110IRTNZ
ISL9110IRTNZ-T
ISL9110IRTNZ-T7A
ISL9110IRT7Z
ISL9110IRT7Z-T
ISL9110IRT7Z-T7A
ISL9110IRTAZ
ISL9110IRTAZ-T
ISL9110IRTAZ-T7A
ISL9112IRTNZ
ISL9112IRTNZ-T
ISL9112IRTNZ-T7A
ISL9112IRT7Z
ISL9112IRT7Z-T
ISL9112IRT7Z-T7A
ISL9110BIRTAZ
ISL9110BIRTAZ-T
NOTES:
1. Refer to
TB347
for details about reel specifications.
2. These Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate
plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Pb-free products are
MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), see the
ISL9110, ISL9112
product information pages. For more information about MSL, see
TB363.
4. The ISL9110 and ISL9112 can be special ordered with any output voltage between 1.9V and 5.0V in 100mV steps.
PART
MARKING
GASA
GASA
GASA
GATA
GATA
GATA
GAUA
GAUA
GAUA
GAVA
GAVA
GAVA
GAWA
GAWA
GAWA
GBAF
GBAF
V
OUT
(V)
3.3
3.3
3.3
5.0
5.0
5.0
ADJ.
ADJ.
ADJ.
3.3
3.3
3.3
5.0
5.0
5.0
ADJ.
ADJ.
HICCUP
MODE
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Disabled
Disabled
TEMP RANGE
(°C)
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
TAPE AND REEL
(UNITS) (Note
1)
-
6k
250
-
6k
250
-
6k
250
-
6k
250
-
6k
250
-
6k
PACKAGE
12 Ld Exposed Pad 3x3 TDFN
12 Ld Exposed Pad 3x3 TDFN
12 Ld Exposed Pad 3x3 TDFN
12 Ld Exposed Pad 3x3 TDFN
12 Ld Exposed Pad 3x3 TDFN
12 Ld Exposed Pad 3x3 TDFN
12 Ld Exposed Pad 3x3 TDFN
12 Ld Exposed Pad 3x3 TDFN
12 Ld Exposed Pad 3x3 TDFN
12 Ld Exposed Pad 3x3 TDFN
12 Ld Exposed Pad 3x3 TDFN
12 Ld Exposed Pad 3x3 TDFN
12 Ld Exposed Pad 3x3 TDFN
12 Ld Exposed Pad 3x3 TDFN
12 Ld Exposed Pad 3x3 TDFN
12 Ld Exposed Pad 3x3 TDFN
12 Ld Exposed Pad 3x3 TDFN
PKG.
DWG. #
L12.3x3C
L12.3x3C
L12.3x3C
L12.3x3C
L12.3x3C
L12.3x3C
L12.3x3C
L12.3x3C
L12.3x3C
L12.3x3C
L12.3x3C
L12.3x3C
L12.3x3C
L12.3x3C
L12.3x3C
L12.3x3C
L12.3x3C
FN7649 Rev.3.00
Jul 26, 2018
Page 4 of 21
ISL9110, ISL9112
Absolute Maximum Ratings
PVIN, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6.5V
LX1, LX2 (Note
7)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6.5V
FB (Adjustable version) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 2.7V
FB (Fixed V
OUT
versions) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6.5V
GND, PGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 0.3V
All Other Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6.5V
ESD Rating
Human Body Model (Tested per JESD22-A114E) . . . . . . . . . . . . . . . . 3kV
Machine Model (Tested per JESD22-A115-A) . . . . . . . . . . . . . . . . . 250V
Latch-Up (Tested per JESD-78B; Class 2, Level A) . . . . . . . . . . . . . . 100mA
Thermal Information
Thermal Resistance (Typical)
JA
(°C/W)
JC
(°C/W)
12 Ld TDFN Package (Notes
5, 6)
. . . . . . .
42
5.5
Maximum Junction Temperature (Plastic Package) . . . . . . . . . . . .+125°C
Storage Temperature Range. . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see
TB493
Recommended Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
Supply Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8V to 5.5V
Load Current Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0A to 1.2A
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product
reliability and result in failures not covered by warranty.
NOTES:
5.
JA
is measured in free air with the component mounted on a high-effective thermal conductivity test board with “direct attach” features. See
TB379
6. For
JC
, the “case temp” location is the center of the exposed metal pad on the package underside.
7. LX1 and LX2 pins can withstand switching transients of -1.5V for 100ns, and 7V for 20ms.
Analog Specifications
PARAMETER
V
VIN
= V
PVIN
= V
EN
= 3.6V, V
OUT
= 3.3V, L1 = 2.2µH, C
1
= C
2
= 10µF, T
A
= +25°C. Boldface limits apply over the
operating temperature range, -40°C to +85°C.
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
(Note
8)
(Note
9)
(Note
8)
UNIT
POWER SUPPLY
Input Voltage Range
V
IN
Undervoltage Lockout Threshold
V
IN
V
UVLO
Rising
Falling
V
IN
Supply Current
V
IN
Supply Current, Shutdown
I
VIN
I
SD
PFM mode, no external load on Vout (Note 10)
EN = GND, V
IN
= 3.6V
1.550
1.8
1.725
1.650
35
0.05
60
1.0
5.5
1.775
V
V
V
µA
µA
OUTPUT VOLTAGE REGULATION
Output Voltage Range
V
OUT
ISL9110IRTAZ, I
OUT
= 100mA
ISL9112, I
OUT
= 100mA
Output Voltage Accuracy
V
IN
= 3.7V, V
OUT
= 3.3V, I
OUT
= 0mA, PWM mode
V
IN
= 3.7V, V
OUT
= 3.3V, I
OUT
= 1mA, PFM mode
FB Pin Voltage Regulation
FB Pin Bias Current
Line Regulation, PWM Mode
Load Regulation, PWM Mode
Line Regulation, PFM Mode
Load Regulation, PFM Mode
Output Voltage Clamp
Output Voltage Clamp Hysteresis
V
FB
I
FB
V
OUT
/
V
IN
V
OUT
/
I
OUT
V
OUT
/
V
I
V
OUT
/
I
OUT
V
CLAMP
For adjustable output version
For adjustable output version
I
OUT
= 500mA, V
OUT
= 3.3V, MODE = GND, V
IN
step
from 2.3V to 5.5V
V
IN
= 3.7V, V
OUT
= 3.3V, MODE = GND, I
OUT
step from
0mA to 500mA
I
OUT
= 100mA, V
OUT
= 3.3V, MODE = VIN, V
IN
step
from 2.3V to 5.5V
V
IN
=3.7V, V
OUT
= 3.3V, MODE = VIN, I
OUT
step from
0mA to 100mA
Rising, V
IN
= 3.6V
V
IN
= 3.6V
5.25
400
±0.005
±0.005
±12.5
±0.4
5.95
1.00
1.90
-2
-3
0.79
0.80
5.20
5.00
+2
+4
0.81
1
V
V
%
%
V
µA
mV/mV
mV/mA
mV/V
mV/mA
V
mV
DC/DC SWITCHING SPECIFICATIONS
Oscillator Frequency
f
SW
2.25
2.50
2.75
MHz
FN7649 Rev.3.00
Jul 26, 2018
Page 5 of 21
