Diodes AP7167 User Manual

AP7167

1.2A LOW DROPOUT REGULATOR WITH POK

Description

The AP7167 is a 1.2A, adjustable output voltage, ultra-low dropout linear regulator. The device includes pass element, error amplifier, band-gap reference, current limit and thermal shutdown circuitry. The device is turned on when EN pin is set to logic high level. A Power-OK (POK) output is available for power sequence control.

The characteristics of the low dropout voltage and low quiescent current make it suitable for low to medium power applications, for example, laptop computers, audio and video applications, and battery powered devices. The typical quiescent current is approximately 125µA.

Built-in current-limit and thermal-shutdown functions prevent IC from damage in fault conditions.

The AP7167 are available in DFN3030-10 and SOP-8L packages.

Features

Pin Assignments

IN IN

POK

NC EN

IN

( Top View )

1

2

3

4

5

DFN3030-10

( Top View )

1

2

10

OUT

9

OUT

8

FB

7

NC

6

GND

8

7

OUT

• Wide input voltage range: 2.2V – 5.5V

• 230mV very low dropout at 500mA load

• 500mV very low dropout at 1A load

• 3% total accuracy over line, load and temperature

• Very low quiescent current (IQ): 125µA typical

• Adjustable output voltage range: 0.8V to 5.0V

• Very fast transient response

• High PSRR

• Accurate voltage regulation

• Current limiting and short circuit protection

• Thermal shutdown protection

• Stable with any type output capacitor ≥ 4.7µF

• Ambient temperature range -40ºC to 85 ºC

• DFN3030-10 and SOP-8L-EP: Available in “Green” Molding Compound (No Br, Sb)

• Lead Free Finish/ RoHS Compliant (Note 1)

Notes: 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.

POK

EN

Applications

• Servers and laptops

• Smart phone and PDA

• MP3/MP4

• Bluetooth headset

• Low and medium power applications

• FPGA and DSP core or I/O power

3

4

SOP-8L-EP

6

5

FB

GND

AP7167

Document number: DS31252 Rev. 7 - 2

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September 2010

Typical Application Circuit

AP7167

1.2A LOW DROPOUT REGULATOR WITH POK

V

IN

1µF

100kOhm

Enable

IN

AP7167

POK

EN

OUT

FB

GND

R

1

R

2

V

OUT

V

REF

⎛ ⎜

1

⎜ ⎝

⎞

R

1

⎟

+=

⎟

R

2

⎠

Pin Descriptions

Pin Name

IN 1, 2 1, 2

POK 3 3 Power-OK output, active-high open-drain.

EN 5 4 Enable input, active high.

GND 6 5 Ground.

FB 8 6 Output feedback.

OUT 9, 10 7, 8

NC 4, 7 NA No connection.

DFN3030-10 SOP-8L-EP

Pin #

Description

Voltage input pins, to be tied together externally. Bypass to ground through at least 1µF capacitor.

Voltage output pins, to be tied together extern ally. Bypass to ground through at least 4.7µF ceramic capacitor.

V

OUT

10µF

AP7167

Document number: DS31252 Rev. 7 - 2

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September 2010

Functional Block Diagram

AP7167

1.2A LOW DROPOUT REGULATOR WITH POK

IN

EN

POK

Gate

Driver

Current Limit and Thermal

Shutdown

0.8V

0.744V

OUT

FB

GND

Absolute Maximum Ratings

Symbol Parameter Ratings Unit

ESD HBM Human Body Model ESD Protection 4 KV

ESD MM Machine Model ESD Protection 300 V

VIN Input Voltage 7 V

OUT, FB, POK, EN Voltage VIN + 0.3 V Continuous Load Current Internal Limited

TJ Operating Junction Temperature Range -40 ~ 150 °C

TST Storage Temperature Range -65 ~150 °C

PD Power Dissipation

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

DFN3030-10 (Note 2, 4) 3.1 W SOP-8L-EP (Note 2, 5) 4.0 W

Recommended Operating Conditions

Symbol Parameter Min Max Unit

V

I

OUT

T

IN

A

Input voltage 2.2 5.5 V Output Current 0 1.2 A Operating Ambient Temperature -40 85

AP7167

Document number: DS31252 Rev. 7 - 2

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September 2010

°C

AP7167

1.2A LOW DROPOUT REGULATOR WITH POK

Electrical Characteristics

(TA = 25oC, V

Symbol Parameter Test Conditions Min Typ. Max Unit

I

Q

I

SHDN

V

Dropout

V

REF

I

FB

V

OUT

ΔV

OUT

ΔV

IN

ΔV

/ V

OUT

tST

PSRR

I

LIMIT

I

SHORT

V V I

EN

VOL

V

POK_TH_UP

V

POK_Hys

POK deglitch

I

POK_LK

T

SHDN

T

HYS

θ

JA

Notes: 3. POK pin must be disconnected from IN pin.

4. Test condition for DFN3030-10: Device mounted on FR-4 2-layer board, 2oz copper, with minimum recommended pad on top layer and 6 vias to

bottom layer 1.0”x1.5” ground plane.

5. Test condition for SOP-8L-EP: Device mounted on 2" x 2" FR-4 substrate PCB, 2oz copper, with minimum recommended pad on top layer and

thermal vias to bottom layer ground plane.

= V

OUT

+1V, C

IN

Input Quiescent Current I Input Shutdown Current VEN = 0V, I

Dropout Voltage FB reference voltage 0.8 V

FB leakage Output Voltage Total Accuracy

Line Regulation

OUT

V

/

Load Regulation I

OUT

Start-up Time, from EN high to POK high

Power Supply Rejection Ratio Current limit

Short-circuit Current V

IL

IH

EN Input Logic Low Voltage 0.4 V EN Input Logic High Voltage 1.4 V EN Input leakage V

= 1µF, C

IN

= 10µF, V

OUT

= VIN, unless otherwise stated)

EN

V V

OUT

OUT OUT

= 0

≥ 1.5V, I ≥ 1.5V, I

= 0 (Note 3) -1 0.1 1 µA

OUT

= 0.5A

OUT

= 1A

OUT

⎯

Over line, load and temperature

V

= V

IN

I

OUT

V

EN

100mA, V 1kHz, V

I

OUT

V

OUT

IN

EN

+1V to 5.5V,

OUT

= 1mA

from 1mA to 1A -1.5 1.5 %

= 0V to 2.0V, I

= 3.3V

IN

= 3.3V, V

IN

OUT

=

= 1.2V,

= 100mA

= 1.8V, R

= 3.3V, V

= 0.5Ω

OUT

< 0.2V 750 mA

OUT

= 0V or 5.5V

-3 3 %

1.2 1.6 A

⎯

125 180 µA

230 mV 500 800 mV

0.01 1 µA

0.02 %/V

190 µs

60 dB

0.01 1 µA

POK output low voltage Force 2mA 100 200 mV Output voltage (rising) POK threshold Output voltage POK hysteresis 4% V

V POK leakage current V Thermal shutdown threshold 155 Thermal shutdown hysteresis 25

Thermal Resistance Junction-toAmbient

FB (or OUT for fixed version) rising

= 3.3V, V

IN

= 5.5V

POK

= 1.2 V 160 µs

OUT

87% 92% 97% V

⎯

0.01 1 µA

DFN3030-10 (Note 4) 40 SOP-8L-EP (Note 5) 27

°C °C

o

C/W

o

C/W

ref

Typical Performance Characteristics

AP7167

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September 2010

AP7167

1.2A LOW DROPOUT REGULATOR WITH POK

Output Voltage vs. Temperature

3.40

3.35

3.30

3.25

Output Voltage (V)

3.20

VOUT = 3.3V

-50 -25 0 25 50 75 100 125

Temperature (0C)

Quiescent Current vs. Input Voltage

=3.3V

V

OUT

170

A)

155

μ

140

125

110

95

Quiescent Current (

80

4.0 4.3 4.6 4.9 5.2 5.5

Input Voltage (V)

Iout=0mA Iout=500mA

Output Voltage vs. Temperature

1.30

1.25

1.20

1.15

VOUT = 1.2V

Output Voltage (V)

1.10

-50-250 255075100125

Temperature (0C)

Qui escent C urrent vs. I

V

=1.8V

170

A)

160

μ

150

140

130

120

110

Quiescent Current (

100

OUT

0.0 0.2 0.4 0. 6 0.8 1.0 1. 2

I

(A)

OUT

VIN=2.5V VIN=3.3V

Qui escent C urrent vs. Temperature

170

A)

π

155

140

125

110

95

Quiescent Current (

80

-50.0 -25.0 0.0 25.0 50.0 75.0 100.0 125.0

VIN=2.2V, Vout=1.0V VIN=3.3V, Vout=1.8V VIN=5.0V, Vout=3.3V

Temperature (0C)

Typical Performance Characteristics (Continued)

AP7167

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Reference Voltage vs. Temperature

0.810

0.805

0.800

0.795

Reference Voltage (V)

0.790

-50-250 255075100125

Temperature (0C)

Vin=2.2V Vin=3.3V Vin=5.5V

September 2010