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AP7335
User Manual
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Diodes AP7335 User Manual

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.
NEW PRODUCT
The AP7335 is available in SOT25 and DFN2020-6 packages.
Features
• 300mA Low Dropout Regulator with EN
• Very low I
• 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)
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.
: 35µA
Q
Pin Assignments
IN
1
2
GND
EN
3
(Fixed Output)
(Top View)
EN
1 2
GND
IN
3
DFN2020-6
(Fixed Output)
Applications
• Smart Phones
• MP3/MP4
• Battery-powered devices
• Bluetooth headset
(Top View)
SOT25
6 5 4
5
4
NC NC OUT
OUT
NC
GND
1
IN
2
EN
3
EN
GND
IN
(ADJ Outpu t)
(Top View)
SOT25
(ADJ Output)
(Top View)
1 2 3
DFN2020-6
6 5 4
5
4
ADJ NC
OUT
OUT
ADJ
AP7335
Document number: DS32259 Rev. 3 - 2
1 of 16
December 2011
© Diodes Incorporated
Typical Application Circuit
V
IN
IN
OUT
AP7335
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
V
OUT
V
IN
IN
OUT
V
OUT
1uF
Pin Descriptions
NEW PRODUCT
Pin
Name
IN 1 1 3 3
GND 2 2 2 2 Ground
EN 3 3 1 1 Enable input, active high
ADJ - 4 - 6 Output feedback pin
NC 4 - 5, 6 5 No connection
OUT 5 5 4 4
Enable
SOT25
(fixed)
AP7335
EN
Ad just a b le Outpu t
ADJ
GND
Pin Number
SOT25
(adj)
DFN2020-6
(fixed)
R1
R2
1uF
⎛
R
1
⎜
+= K80Rwhere
1VV
REFOUT
⎜
R
2
⎝
DFN2020-6
(adj)
AP7335
1uF
Enable
⎞ ⎟ ⎟ ⎠
Ω≤
2
EN
GND
Fixed Output
Description
Voltage input pin. Bypass to ground through at least 1µF MLCC capacitor
Voltage output pin. Bypass to ground through 1µF MLCC capacitor
1uF
AP7335
Document number: DS32259 Rev. 3 - 2
2 of 16
December 2011
© Diodes Incorporated
Functional Block Diagram
AP7335
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
IN
EN
NEW PRODUCT
Absolute Maximum Ratings
Symbol Parameter Ratings Unit
ESD HBM Human Body Model ESD Protection 2000 V
ESD MM Machine Model ESD Protection 200 V
VIN
OUT, EN Voltage Continuous Load Current per Channel Internal Limited
TST
TJ
Input Voltage 6.5 V
Storage Temperature Range -65 to 150 °C Maximum Junction Temperature 150 °C
Gate
Driver
Fixed Version
Current Limit and Thermal
Shutdown
0.8V
OUT
R
R
GND
IN
EN
Gate
Driver
Adjustable Version
VIN + 0.3
Current Limit and Thermal
Shutdown
0.8V
OUT
ADJ
GND
V
Recommended Operating Conditions
Symbol Parameter Min Max Unit
V
IN
I
OUT
T
A
Note: 2. The device maintains a stable, regulated output voltage without a load current.
Input voltage 2 6 V Output Current (Note 2) 0 300 mA Operating Ambient Temperature -40 85 °C
AP7335
Document number: DS32259 Rev. 3 - 2
3 of 16
December 2011
© Diodes Incorporated
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
Electrical Characteristics
= 25oC, V
(T
A
Symbol Parameter Test Conditions Min Typ. Max Unit
V
REF
I
ADJ
V
OUT
ΔV
OUT
ΔV
/V
IN
ΔV
OUT
V
OUT
V
Dropout
I
Q
I
SHDN
I
NEW PRODUCT
LEAK
tST
PSRR PSRR (Note 4)
I
SHORT
I
LIMIT
V
IL
V
IH
I
EN
T
SHDN
T
HYS
θ
JA
Notes: 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
4. At V
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
= V
OUT
+1V, C
IN
ADJ Reference Voltage (Adjustable version)
= 1μF, C
IN
OUT
= 1μF, V
= 2V, unless otherwise stated)
EN
I
= 0mA
OUT
0.8 V
ADJ Leakage (Adjustable version) 0.1 1 μA
T
= -40oC to 85oC,
Output Voltage Accuracy
/
Line Regulation
/
Load Regulation
Dropout Voltage (Note 3) Input Quiescent Current
Input Shutdown Current Input Leakage Current
Start-up Time
Short-circuit Current
Current limit EN Input Logic Low Voltage
EN Input Logic High Voltage EN Input Current
A
I
= 10% of I
OUT
V
= (V
IN
= VIN, I
V
EN
V
= (V
IN
I
= 1mA to 300mA
OUT
< 2.5V, I
V
OUT
V
≥ 2.5V, I
OUT
= VIN, I
V
EN
= 0V, I
V
EN
= 0V, OUT grounded
V
EN
V
= 0V to 2.0V in 1μs,
EN
= 300mA
I
OUT
V
= [V
IN
f = 1kHz, I V
= V
IN
IN-Min
< 0.2V (fixed) or
V
OUT
25% of V V
= V
IN
IN-Min
V
OUT/ROUT
= V
V
IN
IN-Min
= V
V
IN
IN-Min
= 0V or V
V
IN
OUT-Max
+1V) to V
OUT
= 1mA
OUT
+1V) to V
OUT
OUT OUT
= 0mA
OUT
= 0mA
OUT
+1V]VDC + 0.5V
OUT
= 50mA
OUT
to V
(ADJ version)
OUT
to V
= 1.2A
to V to V
IN-Max
IN-Max
IN-Max
= 300mA
= 300mA
,
IN-Max
,
IN-Max
IN-Max IN-Max
,
,
ppAC
-2 2 %
0.02 0.20 %/V
-0.6 0.6 % 170 300
150 200 35 80 μA
0.1 1
0.1 1 220 μs
,
65 dB
140 mA
400 600 mA
0.4 V
1.4 V
-1 1 μA Thermal shutdown threshold 145 °C Thermal shutdown hysteresis 15 °C
Thermal Resistance Junction-to-Ambient
< 2.3V, the PSRR performance may be reduced.
IN
SOT25 (Note 5) 187 DFN2020-6 (Note 5) 251
= 2.0V.
IN
4 of 16
AP7335
mV
μA μA
o
C/W
December 2011
© Diodes Incorporated
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
Typical Performance Characteristics
Start-Up Time
=0 to 2V (1V/div)
V
EN
=5V
V
IN
C
=3.3V (1V/div)
V
OUT
with no load
IN=COUT
=1μF
AP7335
LOW DROPOUT LINEAR REGULATOR
Start-Up Time
=0 to 2V (1V/div)
V
EN
=5V
V
IN
C
IN=COUT
V
=3.3V (1V/div)
OUT
with 300mA load
=1μF
NEW PRODUCT
Time (40μs/div)
Line Transient Response
V
=4.3V to 5.3V (1V/div)
IN
Tr=Tf=2μs
=none, C
C
IN
=3.3V (20mV/div)
V
OUT
I
=30mA (50mA/div)
OUT
OUT
=1μF
Time (40μs/div)
Time (40μs/div)
Line Transient Response
V
=4.3V to 5.3V (1V/div)
IN
Tr=Tf=2μs
=none, C
C
IN
=3.3V (20mV/div)
V
OUT
I
=300mA(200mA/div)
OUT
OUT
=1μF
Time (40μs/div)
AP7335
Document number: DS32259 Rev. 3 - 2
5 of 16
December 2011
© Diodes Incorporated
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