Diodes AP7312 User Manual

AP7312

DUAL 150mA LOW QUIESCENT CURRENT FAST

TRANSIENT LOW DROPOUT LINEAR REGULATOR

Description

The AP7312 is 150mA, dual fixed output voltage, lo w dropout linear regulator. The AP7312 include the pass element, error amplifier, band-gap, current limit and thermal shutdown circuitry which protect the IC from damage in fault conditions. The AP7312 has two enable pins (EN1 and EN2) to independently turn the respective channel on when a logic high level is applied.

The characteristics of low dropout voltage and low quiescent current make it suitable for low power applications. The typical quiescent current is approximately 60μA.

This device is available with fixed output options of

1.2V/1.8V, 1.2V/3.3V, 1.5V/2.5V, 1.5V/3.3V, 1.8V/2.8V,

1.8V/3.0V, 1.8V/3.3V and 3.3V/3.3V. For other output options please contact our local sales representative directly or through our distributor located in your area.

Pin Assignments

NEW PRODUCT

The AP7312 is available in SOT26 and DFN2018-6 packages.

Features

• 150mA Low Dropout Regulator with EN

• Very low IQ: 60µA

• Wide input voltage range: 2V to 6V

• Fixed output options: 1.2V to 3.3V

• High PSRR: 65dB at 1kHz

• Fast start-up time: 60µs

• Stable with low ESR, 1µF ceramic output capacitor

• Excellent Load/Line Transient Response

• Low dropout: 150mV at 150mA

• Current limit protection

• Short circuit protection

• Thermal shutdown protection

• Ambient temperature range: -40ºC to 85°C

• SOT26 and DFN2018-6: 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.

Applications

• Cellular Phones

• Smart Phones, PDAs

• MP3/MP4

• Bluetooth head set

• Low power application

OUT2

GND

EN2

EN1

EN2

(Top View)

1

2

3

(Top View)

1

IN

2

3

DFN2018-6

SOT26

6

OUT1

5

IN

4

EN1

6

OUT1

OUT2

5

4

GND

AP7312

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Typical Application Circuit

AP7312

DUAL 150mA LOW QUIESCENT CURRENT FAST

TRANSIENT LOW DROPOUT LINEAR REGULATOR

Pin Descriptions

NEW PRODUCT

Pin Name

OUT2 1 5 Voltage output 2. Bypass to ground through 1µF ceramic capacitor

GND 2 4 Ground

EN2 3 3 Enable input 2, active high EN1 4 2 Enable input 1, active high

IN 5 1 Voltage input. Bypass to ground through at least 1µF capacitor

OUT1 6 6 Voltage output 1. Bypass to ground through 1µF ceramic capacitor

V

IN

1uF

OFF

Pin Number

SOT26 DFN2018-6

ON

VIN

EN1

EN2

VOUT1

VOUT2

GND

V

OUT2

1uF

Description

V

OUT1

1uF

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Functional Block Diagram

AP7312

DUAL 150mA LOW QUIESCENT CURRENT FAST

TRANSIENT LOW DROPOUT LINEAR REGULATOR

NEW PRODUCT

IN

EN 1

EN 2

Thermal

Shutdown

Gate

Driver

Gate

Driver

OUT 1

Current Limit

and

Short Circuit

Bandgap

GND

Current Limit

and

Short Circuit

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OUT 2

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Absolute Maximum Ratings

Symbol Parameter Ratings Unit

ESD HBM Human Body Model ESD Protection 8 kV

ESD MM Machine Model ESD Protection 400 V

VIN Input Voltage 6.5 V

OUT, EN Voltage VIN + 0.3 V

Continuous Load Current Internal Limited TOP Operating Junction Temperature Range -40 ~ 125 °C TST Storage Temperature R ange -65 ~150 °C

PD Power Dissipation (Note 3)

TJ Maximum Junction Temperature 150 °C

Recommended Operating Conditions

NEW PRODUCT

Symbol Parameter Min Max Unit

V

IN

I

OUT

T

A

Notes: 2. Ratings apply to ambient temperature at 25°C.

3. The device maintains a stable, regulated output voltage without a load current.

AP7312

Document number: DS35133 Rev. 2 - 2

Input voltage 2 6 V Output Current (Note 3) 0 150 mA Operating Ambient Temperature -40 85

AP7312

DUAL 150mA LOW QUIESCENT CURRENT FAST

TRANSIENT LOW DROPOUT LINEAR REGULATOR

SOT26 950 mW DFN2018-6 2200 mW

°C

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AP7312

x

Electrical Characteristics

= 25oC, V

(T

A

Symbol Parameter Test Conditions Min Typ. Max Unit

V

REF

I

ADJ

V

OUT

ΔV

/ΔVIN/V

OUT

ΔV

OUT

V

Dropout

I

Q

I

SHDN

I

LEAK

tST

NEW PRODUCT

PSRR I

SHORT

I

LIMIT

V V 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. This specification is guaranteed by design.

6. Test condition for SOT26: Device mounted on FR-4 substrate PC board, with minimum recommended pad layout

7. Test condition for DFN2018-6: Device mounted on FR-4 2-layer board,2oz copper, with minimum recommended pad on top layer and 3 vias to bottom layer.

/V

IL IH

= V

IN

+1V, C

OUT

ADJ Reference Voltage (Adjustable version)

= 1uF, C

IN

OUT

= 1uF, V

ADJ Leakage (Adjustable version) 0.1 1 μA Output Voltage Accuracy

Line Regulation Load Regulation

OUT

Dropout Voltage (Note 4) Input Quiescent Current (2 channels) V

Input Shutdown Current VEN = 0V, I Input Leakage Current VEN = 0V, OUT grounded 0.1 1

Start-up Time

PSRR (Note 5) Short-circuit Current Current limit

EN Input Logic Low Voltage VIN = V EN Input Logic High Voltage VIN = V EN Input Current VIN = 0V or V Thermal shutdown threshold 165 Thermal shutdown hysteresis 30

Thermal Resistance Junction-to-Ambient

DUAL 150mA LOW QUIESCENT CURRENT FAST

TRANSIENT LOW DROPOUT LINEAR REGULATOR

= VIN, unless otherwise stated)

EN

= 0mA 0.8 V

I

OUT

= -40oC to 85oC,

T

A

I

= 10% of I

OUT

= (V

V

IN

V

EN

= (V

V

IN

I

OUT

V

OUT

V

OUT EN

V

EN

I

OUT

= [V

V

IN

f = 1kHz, I

= V

V

IN

V

OUT

= V

V

IN

V

OUT/ROUT

+1V) to V

OUT

= VIN, I

OUT

+1V) to V

OUT

= 1mA to 150mA

< 2.5V, I ≥ 2.5V, I

= VIN, I

OUT

= 0V to 2.0V in 1μs,

= 150mA

+1V]VDC + 0.5V

OUT

= 50mA

OUT

to V

IN-Min

= 1/4 target V

to V

IN-Min

= 0.6A

to V

IN-Min

to V

IN-Min

IN-Max

OUT-Ma

,

IN-Max

= 1mA

,

IN-Max

= 150mA 200 300

OUT

= 150mA 150 200

OUT

= 0mA 60 80 μA = 0mA 0.1 1

ppAC

,

IN-Max

OUT

,

IN-Max

0.4 V

IN-Max

1.4 V

IN-Max

-1 1 μA

SOT26 (Note 6) 140 DFN2018-6 (Note 7) 60

-2 2 %

0.01 0.20 %/V

-0.6 0.6 %

150 μs

,

60 65 dB

60 mA

200 300 mA

mV

μA μA

°C °C

o

C/W

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Typical Performance Characteristics

Start-Up Time

=5V, No load

V

IN

C

IN=COUT1=COUT2

=1μF

VEN=0V to 2V (2V/div) VEN=0V to 2V (2V/div)

AP7312

DUAL 150mA LOW QUIESCENT CURRENT FAST

TRANSIENT LOW DROPOUT LINEAR REGULATOR

Start-Up Time

V

=5V, Both I

IN

C

IN=COUT1=COUT2

LOAD

=1μF

=150mA

NEW PRODUCT

=2.8V (1V/div)

V

OUT2

=1.8V (1V/div)

V

OUT1

Time (40μs/div)

Line Transient Response

=3.8V to 4.8V (1V/div)

V

IN

C

OUT1=COUT2

=1.8V (10mV/div) V

V

OUT1

=1μF, Tr=Tf=2μs, Both I

LOAD

=15mA

Line Transient Response

V

=3.8V to 4.8V (1V/div)

IN

C

OUT1=COUT2

=1.8V (10mV/div)

OUT1

=1μF, Tr=Tf=2μs, Both I

V

OUT2

V

OUT1

Time (40μs/div)

=2.8V (1V/div)

=1.8V (1V/div)

=100mA

LOAD

V

=2.8V (10mV/div)

OUT2

Time (100μs/div)

AP7312

Document number: DS35133 Rev. 2 - 2

V

OUT2

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=2.8V (10mV/div)

Time (100μs/div)

January 2011