AP7335
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
Description
The AP7335 is a 300mA, adjustable and fixed output
voltage, low dropout linear regulator. The device included
pass element, error amplifier, band-gap, current limit and
thermal shutdown circuitry. The device is turned on when
EN pin is set to logic high level.
The characteristics of low dropout voltage and low quiescent
current make it suitable for low power applications, for
example, battery powered devices. The typical quiescent
current is approximately 35μA. Built-in current-limit and
thermal-shutdown functions prevent IC from damage in fault
conditions.
This device is available with adjustable output from 0.8V to
5.0V, and fixed version with 0.8V, 1.0V, 1.2V, 1.5V, 1.8V,
2.0V, 2.5V, 2.7V, 2.8V, 3.0V, 3.3V and 3.9V outputs. Please
contact your local sales office for any other voltage options.
The AP7335 is available in SOT25 and DFN2020-6
packages.
Pin Assignments
(Top View)
IN 1
GND 2
EN 3
SOT25
(Fixed Output)
(Top View)
EN 1
GND 2
IN 3
6 NC
5 NC
4 OUT
4 NC
5 OUT
IN 1
GND 2
EN 3
SOT25
(ADJ Output)
4 ADJ
(Top View)
5 OUT
NEW PRODUCT
(Top View)
EN 1
GND 2
IN 3
6 ADJ
5 NC
4 OUT
DFN2020-6
(Fixed Output)
DFN2020-6
(ADJ Output)
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
300mA Low Dropout Regulator with EN
Very low I
Q
: 35µA
Wide input voltage range: 2V to 6V
Wide adjustable output: 0.8V to 5.0V
Fixed output options: 0.8V to 3.9V (0.1V step size
possible)
High PSRR: 65dB at 1kHz
Fast start-up time: 220µs
Stable with low ESR, 1µF ceramic output capacitor
Excellent Load/Line Transient Response
Low dropout: 150mV at 300mA
Current limit and short circuit protection
Thermal shutdown protection
Ambient temperature range: -40ºC to 85°C
SOT25, and DFN2020-6: Available in “Green” Molding
Compound (No Br, Sb)
Lead Free Finish/ RoHS Compliant (Note 1)
Applications
•
•
•
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Smart Phones
MP3/MP4
Battery-powered devices
Bluetooth headset
Note:
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
AP7335
Document number: DS32259 Rev. 3 - 2
1 of 16
www.diodes.com
December 2011
© Diodes Incorporated
AP7335
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
Typical Application Circuit
V
IN
IN
O UT
V
OUT
V
IN
IN
OUT
V
OUT
AP7335
1uF
Enable
EN
G ND
ADJ
R1
1uF
AP7335
1uF
Enable
EN
GND
1uF
R2
NEW PRODUCT
Adjustable O utput
Fixed Output
⎛
R
⎞
V
OUT
=
V
REF
⎜
1
+
1
⎟
where R
2
≤
80K
Ω
⎜
R
⎟
2
⎠
⎝
Pin Descriptions
Pin
Name
Pin Number
SOT25
(fixed)
SOT25
(adj)
DFN2020-6
(fixed)
DFN2020-6
(adj)
Description
IN
GND
EN
ADJ
NC
OUT
1
2
3
-
4
5
1
2
3
4
-
5
3
2
1
-
5, 6
4
3
2
1
6
5
4
Voltage input pin. Bypass to ground through at least 1µF
MLCC capacitor
Ground
Enable input, active high
Output feedback pin
No connection
Voltage output pin. Bypass to ground through 1µF MLCC
capacitor
AP7335
Document number: DS32259 Rev. 3 - 2
2 of 16
www.diodes.com
December 2011
© Diodes Incorporated
AP7335
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
Functional Block Diagram
IN
Current Limit
and Thermal
Shutdown
OUT
IN
Current Limit
and Thermal
Shutdown
OUT
EN
Gate
Driver
EN
R
Gate
Driver
NEW PRODUCT
ADJ
0.8V
R
0.8V
GND
GND
Fixed Version
Adjustable Version
Absolute Maximum Ratings
Symbol
Parameter
Ratings
Unit
ESD HBM
ESD MM
V
IN
Human Body Model ESD Protection
Machine Model ESD Protection
Input Voltage
OUT, EN Voltage
Continuous Load Current per Channel
2000
200
6.5
V
IN
+ 0.3
Internal Limited
-65 to 150
150
V
V
V
V
°C
°C
T
ST
T
J
Storage Temperature Range
Maximum Junction Temperature
Recommended Operating Conditions
Symbol
Parameter
Min
Max
Unit
V
IN
I
OUT
T
A
Note:
Input voltage
Output Current (Note 2)
Operating Ambient Temperature
2
0
-40
6
300
85
V
mA
°
C
2. The device maintains a stable, regulated output voltage without a load current.
AP7335
Document number: DS32259 Rev. 3 - 2
3 of 16
www.diodes.com
December 2011
© Diodes Incorporated
AP7335
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
Electrical Characteristics
(T
A
= 25
o
C, V
IN
= V
OUT
+1V, C
IN
= 1μF, C
OUT
= 1μF, V
EN
= 2V, unless otherwise stated)
Symbol
Parameter
Test Conditions
Min
Typ.
Max
Unit
V
REF
I
ADJ
V
OUT
Δ
V
OUT
/
Δ
V
IN
/V
Δ
V
OUT
/
V
OUT
ADJ Reference Voltage (Adjustable version)
ADJ Leakage (Adjustable version)
Output Voltage Accuracy
Line Regulation
Load Regulation
I
OUT
= 0mA
T
A
= -40
o
C to 85
o
C,
I
OUT
= 10% of I
OUT-Max
V
IN
= (V
OUT
+1V) to V
IN-Max
,
V
EN
= V
IN
, I
OUT
= 1mA
V
IN
= (V
OUT
+1V) to V
IN-Max
,
I
OUT
= 1mA to 300mA
V
OUT
< 2.5V, I
OUT
= 300mA
V
OUT
≥
2.5V, I
OUT
= 300mA
V
EN
= V
IN
, I
OUT
= 0mA
V
EN
= 0V, I
OUT
= 0mA
V
EN
= 0V, OUT grounded
V
EN
= 0V to 2.0V in 1μs,
I
OUT
= 300mA
V
IN
= [V
OUT
+1V]V
DC
+ 0.5V
ppAC
,
f = 1kHz, I
OUT
= 50mA
V
IN
= V
IN-Min
to V
IN-Max
,
V
OUT
< 0.2V (fixed) or
25% of V
OUT
(ADJ version)
V
IN
= V
IN-Min
to V
IN-Max
,
V
OUT
/R
OUT
= 1.2A
V
IN
= V
IN-Min
to V
IN-Max
V
IN
= V
IN-Min
to V
IN-Max
V
IN
= 0V or V
IN-Max
1.4
-1
-0.6
0.8
0.1
-2
0.02
1
2
0.20
0.6
170
150
35
0.1
0.1
220
65
300
200
80
1
1
V
μA
%
%/V
%
mV
μA
μA
μA
μs
dB
NEW PRODUCT
V
Dropout
Dropout Voltage (Note 3)
I
Q
I
SHDN
I
LEAK
t
ST
PSRR
Input Quiescent Current
Input Shutdown Current
Input Leakage Current
Start-up Time
PSRR (Note 4)
I
SHORT
Short-circuit Current
140
mA
I
LIMIT
V
IL
V
IH
I
EN
T
SHDN
T
HYS
θ
JA
Notes:
Current limit
EN Input Logic Low Voltage
EN Input Logic High Voltage
EN Input Current
Thermal shutdown threshold
Thermal shutdown hysteresis
Thermal Resistance Junction-to-Ambient
400
600
0.4
1
145
15
mA
V
V
μA
°
C
°
C
o
SOT25 (Note 5)
DFN2020-6 (Note 5)
187
251
C/W
3. Dropout voltage is the voltage difference between the input and the output at which the output voltage drops 2% below its nominal value. This
parameter only applies to input voltages above minimum V
IN
= 2.0V.
4. At V
IN
< 2.3V, the PSRR performance may be reduced.
5. Test condition for all packages: Device mounted on FR-4 substrate PC board, 1oz copper, with minimum recommended pad layout.
AP7335
Document number: DS32259 Rev. 3 - 2
4 of 16
www.diodes.com
December 2011
© Diodes Incorporated
AP7335
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
Typical Performance Characteristics
Start-Up Time
Start-Up Time
V
EN
=0 to 2V (1V/div)
V
IN
=5V
C
IN
=C
OUT
=1μF
V
EN
=0 to 2V (1V/div)
V
IN
=5V
C
IN
=C
OUT
=1μF
NEW PRODUCT
V
OUT
=3.3V (1V/div)
with no load
V
OUT
=3.3V (1V/div)
with 300mA load
Time (40μs/div)
Line Transient Response
Time (40μs/div)
Line Transient Response
V
IN
=4.3V to 5.3V (1V/div)
Tr=Tf=2μs
C
IN
=none, C
OUT
=1μF
V
OUT
=3.3V (20mV/div)
V
IN
=4.3V to 5.3V (1V/div)
Tr=Tf=2μs
C
IN
=none, C
OUT
=1μF
V
OUT
=3.3V (20mV/div)
I
OUT
=30mA (50mA/div)
I
OUT
=300mA(200mA/div)
Time (40μs/div)
Time (40μs/div)
AP7335
Document number: DS32259 Rev. 3 - 2
5 of 16
www.diodes.com
December 2011
© Diodes Incorporated
