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AP7335A
User Manual
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Diodes AP7335A User Manual

AP7335A
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
Description
The AP7335A is a 300mA, 5.0V fixed output voltage, low dropout linear regulator with ±1% output voltage accuracy. 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 35μA. Built-in current-limit and thermal-shutdown functions prevent IC from damage in fault conditions.
This device is only available as 5.0V fixed version. Please contact your local sales office for any other voltage options.
The AP7335A is packaged in SOT25 and U-DFN2020-6.
Applications
• Smart Phones
NEW PRODUCT
• MP3/MP4
• Battery-powered devices
• Bluetooth headset
• Battery Charger
• LCD TV
• Multifunction Monitors
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
.
Pin Assignments
IN
1
GND
2
EN
34
Features
• 300mA Low Dropout Regulator with EN
• Very low I
• Fixed output at 5.0V
o V
• 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 U-DFN2020-6 Available in “Green”
Molding Compound (No Br, Sb)
• Lead Free Finish/ RoHS Compliant (Note 1)
SOT25
(Fixed Output)
35µA
Q
5.5V
IN MIN
5
OUT
NC
1
EN
GND
2 3
IN
U-DFN2020-6
(Fixed Output)
6 5 4
NC NC
OUT
Typical Application Circuit
V
AP7335A
Document number: DS35267 Rev. 2 - 2
IN
IN
OUT
AP7335
1uF
Enable
EN
GND
Fixed Output
1 of 12
V
OUT
1uF
October 2011
© Diodes Incorporated
AP7335A
Pin Descriptions
Pin Number
Pin Name
IN 1 3 Voltage input pin. Bypass to ground through at least 1µF MLCC capacitor
GND 2 2 Ground
EN 3 1 Enable input, active high
ADJ - - Output feedback pin
NC 4 5, 6 No connection
OUT 5 4 Voltage output pin. Bypass to ground through 1µF MLCC capacitor
Functional Block Diagram
SOT25
(fixed)
U-DFN2020-6
(fixed)
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
Description
NEW PRODUCT
IN
EN
Gate
Driver
Fixed Version
Current Limit and Thermal
Shutdown
0.8V
OUT
R
R
GND
AP7335A
Document number: DS35267 Rev. 2 - 2
2 of 12
October 2011
© Diodes Incorporated
AP7335A
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
Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratings only; functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time.
Recommended Operating Conditions
NEW PRODUCT
Symbol Parameter Min Max Unit
V
IN
I
OUT
T
A
Notes: 2. The device maintains a stable, regulated output voltage without a load current.
3. V
IN(MIN)
Input Voltage 6.5 V
Storage Temperature Range -65 to 150 °C Maximum Junction Temperature 150 °C
Input voltage (Note 3) 2 (Note 3) 6 V Output Current (Note 2) 0 300 mA Operating Ambient Temperature -40 85 °C
= 5.5V for 5.0V, V
at 300mA I
OUT
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
+ 0.3
V
IN
OUT
V
AP7335A
Document number: DS35267 Rev. 2 - 2
3 of 12
October 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
OUT
ΔV
OUT
/V
/ΔV
IN
ΔV
OUT
/V
OUT
V
DROPOUT
I
Q
I
SHDN
I
LEAK
tST
NEW PRODUCT
PSRR PSRR
I
SHORT
I
LIMIT
V
IL
V
IH
I
EN
T
SHDN
T
HYS
θ
JA
Notes: 4. Dropout voltage is the voltage difference between the input and the output at which the output voltage drops 2% below its nominal value.
5. Test condition for all packages: Device mounted on FR-4 substrate PC board, 1oz copper, with minimum recommended pad layout.
= 5.5 to 6V, C
IN
Output Voltage Accuracy
Line Regulation
Load Regulation Dropout Voltage (Note 4)
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
= 1μF, C
IN
OUT
= 1μF, V
= 2V, unless otherwise stated)
EN
T
= -40oC to 85oC,
A
I
= 10% of I
OUT
OUT-Max
VIN = 5.5V to 6V, V
= VIN, I
EN
= 5.5V to 6V,
V
IN
I
= 1mA to 300mA
OUT
I
= 300mA
OUT
V
= VIN, I
EN
V
= 0V, I
EN
V
= 0V, OUT grounded
EN
V
= 0V to 2.0V in 1μs,
EN
I
= 300mA
OUT
V
= 5.5VDC + 0.5V
IN
f = 1kHz, I VIN = V
IN-Min
V
< 0.2V (fixed) or
OUT
V
= V
IN
IN-Min
V
OUT/ROUT
V
= V
IN
IN-Min
V
= V
IN
IN-Min
V
= 0V or V
IN
OUT
OUT
= 0mA
OUT
= 50mA
OUT
to V
to V
= 1.2A
to V to V
IN-Max
= 1mA
= 0mA
IN-Max
IN-Max
IN-Max IN-Max
ppAC
-1 1 %
0.02 0.20 %/V
-0.6 0.6 % 150 200 mV
35 80 μA
0.1 1
0.1 1 220 μs
,
,
,
65 dB
160 mA
400 650 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
SOT25 (Note 5) 187 U-DFN2020-6 (Note 5) 251
AP7335A
μA μA
o
C/W
AP7335A
Document number: DS35267 Rev. 2 - 2
4 of 12
October 2011
© Diodes Incorporated
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