S-8365/8366 Series
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© ABLIC Inc., 2009-2015
STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM CONTROL or
PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.2.1
_02
The S-8365/8366 Series is a CMOS step-up switching regulator controller which mainly consists of a reference voltage
source, an oscillation circuit, an error amplifier, a phase compensation circuit, a timer latch short-circuit protection circuit, a
PWM control circuit (S-8365 Series) and a PWM / PFM switching control circuit (S-8366 Series).
With an external low-ON-resistance Nch Power MOS FET, this product is ideal for applications requiring high efficiency
and a high output current.
The S-8365 Series efficiently works on voltage’s condition of large I/O difference due to the PWM control circuit linearly
varies the duty ratio to 90%.
During light-load, the S-8366 Series switches its operation to the PFM control by the PWM / PFM switching control circuit
in order to prevent efficiency decline due to the IC operating current.
Ceramic capacitors can be used for output capacitor. Small packages SNT-6A, SOT-23-5 and SOT-23-6 enable
high-density mounting.
Features
Low operation voltage
Input voltage range
Oscillation frequency
Reference voltage
Soft start function
Low current consumption
Duty ratio
: Start at 1.1 V (1 mA) guaranteed (in the product without UVLO function)
: 1.8 V to 5.5 V
: 1.2 MHz, 600 kHz
: 0.6 V2.0%
: 7 ms typ.
: 70
A
typ. at switching off
: Built-in PWM / PFM switching control circuit (S-8366 Series)
28% to 85% (1.2 MHz product)
28% to 90% (600 kHz product)
: Current consumption 1.0
A
max. at shutdown
: Inductor, diode, capacitor, transistor
: Selectable with / without short-circuit protection circuit for each product
Settable delay time by external capacitor
(in the product with short-circuit protection)
: Selectable with / without UVLO for each product
Shutdown function
External parts
Timer latch short-circuit protection circuit
UVLO (under-voltage lockout) function
Lead-free, Sn 100%, halogen-free
*1
*1.
Refer to “
Product Name Structure”
for details.
Applications
MP3 players, digital audio players
Digital cameras, GPS, wireless transceiver
Portable devices
Packages
SNT-6A
SOT-23-5
SOT-23-6
1
S-8365/8366 Series
Block Diagram
STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.2.1
_02
1. With UVLO function and short-circuit protection
L
SD
V
OUT
VDD
UVLO
M1
EXT
V
IN
C
IN
ON/OFF
Triangular Wave
Oscillation Circuit
PWM Comparator
Error
PWM control, or
Amplifier
PWM / PFM
Switching Control
Circuit
Timer Latch
Short-Circuit
Protection
Reference Voltage
ON/OFF
with Soft-Start Circuit
Circuit
CSP
VSS
C
FB
R
FB1
FB
R
FB2
C
OUT
Figure 1
2. With UVLO function, without short-circuit protection
L
SD
V
OUT
UVLO
VDD
Triangular Wave
Oscillation Circuit
PWM Comparator
Error
Amplifier
C
FB
R
FB1
FB
R
FB2
M1
EXT
PWM control, or
PWM / PFM
Switching Control
Circuit
V
IN
C
IN
ON/OFF
ON/OFF
Circuit
Reference Voltage
with Soft-Start Circuit
C
OUT
VSS
Figure 2
2
Rev.2.1
_02
STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8365/8366 Series
3. Without UVLO and short-circuit protection
L
IC Internal
Power Supply
Triangular Wave
Oscillation Circuit
PWM Comparator
M1
EXT
PWM control, or
PWM / PFM
Switching Control
Circuit
Error
Amplifier
SD
V
OUT
VDD
C
FB
R
FB1
FB
R
FB2
V
IN
C
IN
ON/OFF
ON/OFF
Circuit
Reference Voltage
with Soft-Start Circuit
C
OUT
VSS
Figure 3
Caution
To stabilize the output voltage and oscillation frequency of the S-8365/8366 Series, the input voltage of
1.8 V
V
DD
5.5 V is necessary. When connecting the VOUT output to the VDD pin, set the input voltage
(V
OUT
) as to satisfy the above range, including the spike voltage generated in VOUT.
3
S-8365/8366 Series
STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.2.1
_02
Product Name Structure
Users can select the control system, oscillation frequency, short-circuit protection, UVLO function, packages for the
S-8365/8366 Series. Refer to “1.
Product name”
regarding the contents of product name, “2.
Packages”
regarding
the package drawings and “3.
Product list”
regarding the product type.
1.
Product name
(1) SNT-6A
S-836
x
A x
x
x
x
-
I6T1
U
2
Environmental code
U:
Lead-free (Sn 100%), halogen-free
Package name (abbreviation) and IC packing specification
*1
I6T1: SNT-6A, Tape
ON/OFF
pin pull-down
A:
B:
Unavailable
Available
UVLO function
A:
Unavailable
B:
Available
Short-circuit protection
A:
Unavailable
B:
Available
Oscillation frequency
A:
1.2 MHz
B:
600 kHz
Control system
5:
PWM control
6:
PWM / PFM switching control
*1.
Refer to the tape drawing.
4
Rev.2.1
_02
STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8365/8366 Series
(2) SOT-23-5, SOT-23-6
S-836
x
A x
x
x
x
-
xxxx
x
2
Environmental code
U:
Lead-free (Sn 100%), halogen-free
S:
Lead-free, halogen-free
Package name (abbreviation) and IC packing specification
*1
M5T1: SOT-23-5, Tape
M6T1: SOT-23-6, Tape
ON/OFF
pin pull-down
A:
B:
Unavailable
Available
UVLO function
A:
Unavailable
B:
Available
Short-circuit protection
A:
Unavailable (SOT-23-5)
B:
Available (SOT-23-6)
Oscillation frequency
A:
1.2 MHz
B:
600 kHz
Control system
5:
PWM control
6:
PWM / PFM switching control
*1.
Refer to the tape drawing.
2.
Packages
Drawing code
Package
PG006-A-P-SD
MP005-A-P-SD
MP006-A-P-SD
Tape
PG006-A-C-SD
MP005-A-C-SD
MP006-A-C-SD
Reel
PG006-A-R-SD
MP005-A-R-SD
MP006-A-R-SD
Land
PG006-A-L-SD
Package name
SNT-6A
SOT-23-5
SOT-23-6
5
