Diodes AP7176B User Manual

A

P7176B

Description

The AP7176B is a 3.0A ultra low-dropout (LDO) linear regulator that

features an enable input and a power-good output.

The enable input and power-good output allow users to configure

power management solutions that can meet the sequencing

requirements of FPGAs, DSPs, and other applications with different

start-up and power-down requirements.

The AP7176B features two supply inputs, for power conversion

supply and control. With the separation of the control and the power

input very low dropout voltages can be reached and power dissipation

is reduced.

A precision reference and feedback control deliver 1.5% accuracy

over load, line, and operating temperature ranges.

The AP7176B is available in SO-8EP, MSOP-8EP and U-DFN3030-

NEW PRODUCT

10 package with an exposed PAD to reduce the junction to case

resistance and extend the temperature range it can be used in.

Features

• VIN Range: 1.2V to 3.65V V

• Adjustable Output Voltage

• Continuous Output Current I

• Fast Transient Response

• Power on reset monitoring on V

• Internal Soft-Start

• Stable with Low ESR MLCC Capacitors

• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

• Halogen and Antimony Free. “Green” Device (Note 3)

3.0V to 5.5V

CNTL

= 3A

OUT

CNTL

and VIN

3A ULTRA LOW DROPOUT LINEAR REGULATOR WITH ENABLE

Pin Assignments

(Top View)

1

VOUT

2

VOUT

3

VOUT

FB

PG

4

5

GND

U-DFN3030-10

10

VCNTL

9

VIN

8

11

VIN

7

VIN

6

EN

Applications

• Notebook

• PC

• Netbook

• Wireless Communication

• Server

• Motherboard

• Dongle

• Front Side Bus VTT (1.2V/3.3A)

Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free.

3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds.

AP7176B

Document number: DS35818 Rev.3 - 2

www.diodes.com

1 of 14

April 2014

A

Typical Applications Circuit

Pin Descriptions

NEW PRODUCT

Name

VCNTL 4 4 10

V

GND 8 8 11 Ground

PAD EP EP EP Exposed pad connected to GND for good thermal conductivity

SO-8EP MSOP-8EP U-DFN3030-10

PG 1 1 5

EN 2 2 6

VIN 3 3 7,8,9

NC 5 5 No Connection

6 6 1,2,3 Power output pin

OUT

FB 7 7 4 Feedback to set the output voltage via an external resistor divider between V

Pin Number

Functional Block Diagram

P7176B

Figure 1 Typical Application Circuit

Power Good.Output open drain to indicate the status of V This pin is pulled low when the voltage is outside the limits, during thermal shutdown and if either V

Enable Pin. Driving this pin low will disable the part. When left floating an internal current source will pull this pin high and enable it.

Power Input Pin for current supply. Connect a decoupling capacitor (10µF) as close as possible to the pin for noise filtering

BIAS supply for the controller, recommended 5V. Connect a decoupling capacitor (1µF) as close as possible to the pin for noise filtering.

CNTL

Function

or VIN go below their thresholds.

via monitoring the FB pin.

OUT

and GND

AP7176B

Document number: DS35818 Rev.3 - 2

2 of 14

www.diodes.com

April 2014

A

P7176B

Absolute Maximum Ratings (Note 4) (@T

Symbol Parameter Rating Unit

VIN V

V

CNTL

V

OUT

PD

TJ Maximum Junction Temperature 150 °C

T

Storage Temperature -65 to +150 °C

STG

T

Maximum Lead Soldering Temperature, 10 Seconds 260 °C

SDR

Note: 4. 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.

Supply Voltage (VIN to GND) -0.3 to +4.0 V

IN

Supply Voltage (V

CNTL

to GND Voltage -0.3 to VIN +0.3 V

OUT

to GND) -0.3 to +7.0 V

CNTL

PG to GND Voltage -0.3 to +7.0 V

EN, FB to GND Voltage -0.3 to V

Power Dissipation (SO-8EP) 1.7

Power Dissipation (U-DFN3030-10) 1.9

= +25°C, unless otherwise specified.)

A

+0.3 V

CNTL

W Power Dissipation (MSOP-8EP) 1.5

NEW PRODUCT

Recommended Operating Conditions (@T

Symbol Parameter Test Condition Range Unit

V

CNTL

VIN V

V

OUT

I

V

OUT

C

V

OUT

E

ESR of V

SRCOUT

Supply Voltage 3.0 to 5.5 V

CNTL

Supply Voltage 1.2 to 3.65 V

IN

Output Voltage (when V

OUT

Output Current 0 to 3 A

OUT

Output Capacitance

OUT

Output Capacitor 0 to 200 m

OUT

CNTL

TA Ambient Temperature -40 to +85 °C

TJ Junction Temperature -40 to +125 °C

Electrical Characteristics (Specifications apply over V

@TA = +25°C, unless otherwise specified.)

Symbol Parameter Conditions

SUPPLY CURRENT

IV

V

CNTL

ISD V

Supply Current EN = V

CNTL

Supply Current at Shutdown EN = GND — 15 30 µA

CNTL

VIN Supply Current at Shutdown EN = GND, V

POWER-ON-RESET (POR)

Rising V

V

CNTL

Rising V

POR Threshold 2.50 2.70 2.95 V

CNTL

POR Hysteresis — 0.4 — V

POR Threshold 0.8 0.9 1.0 V

IN

VIN POR Hysteresis — 0.5 — V

AP7176B

Document number: DS35818 Rev.3 - 2

= +25°C, unless otherwise specified.)

A

- V

>1.9V) 0.8 to VIN – V

OUT

= 3A at 25% nominal V

I

OUT

I

= 2A at 25% nominal V

OUT

I

= 1A at 25% nominal V

OUT

= 5V, V

CNTL

, I

CNTL

= 0A — 1.0 1.5 mA

OUT

= 3.65V — — 1 µA

IN

8 to 1100

OUT

8 to 1700

OUT

8 to 2400

OUT

= 1.8V, V

IN

= 1.2V and TA = -40°C to +85°C, typical values

OUT

3 of 14

www.diodes.com

V

DROP

AP7176B

Min Typ Max

µF

Unit

April 2014

A

Electrical Characteristics (cont.) (Specifications apply over V

values @TA = +25°C, unless otherwise specified.)

CNTL

= 5V, V

= 1.8V, V

IN

P7176B

= 1.2V and TA = -40°C to +85°C, typical

OUT

Symbol Parameter Conditions

AP7176B

Min Typ Max

OUTPUT VOLTAGE

Reference Voltage FB=V

Output Voltage Accuracy

V

REF

Load Regulation I

V T

Line Regulation I

V

Pull-low Resistance V

OUT

— 0.8 — V

OUT

= 3.0 ~ 5.5V, I

CNTL

= -40 to +125°C

J

=0A to 3A — 0.06 0.25 %

OUT

=10mA, V

OUT

= 3.3V, VEN = 0V, V

CNTL

= 0~3A,

OUT

-1.5 — +1.5 %

= 3.0 to 5.5V -0.15 — +0.15 %/V

<0.8V — 10 — 

OUT

FB Input Current VFB = 0.8V -100 — +100 nA

DROPOUT VOLTAGE

T

= 25°C — 0.33 0.38

J

TJ = -40°C to +125°C — 0.53

T

= +25°C — 0.31 0.36

J

TJ = -40°C to +125°C — 0.50

T

= +25°C — 0.30 0.35

J

TJ = -40°C to +125°C — — 0.48

4.5 5.7 6.7 A

NOMINAL

NEW PRODUCT

-to-V

V

IN

(Note 5)

V

DROP

I

Current-Limit Level

LIM

Dropout Voltage

OUT

= 2.5V

V

OUT

= 5.0V,

V

CNTL

= 3A

I

OUT

T

= +25°C, V

J

V

OUT

V

OUT

= 80% V

OUT

= 1.8V

= 1.2V

TJ = -40°C to +125°C 4.2 — — A

PROTECTIONS

I

Short Current-Limit Level VFB < 0.2V — 1.1 — A

SHORT

TSD Thermal Shutdown Temperature TJ rising — 170 — °C

Thermal Shutdown Hysteresis — 50 — °C

ENABLE AND SOFT-START

EN Logic High Threshold Voltage VEN rising 0.5 0.8 1.1 V

EN Hysteresis — 0.1 — V

EN Pull-High Current EN = GND — 5 — µA

TSS Soft-Start Interval 0.3 0.6 1.2 ms

Turn On Delay From being enabled to V

rising 10% 200 350 500 µs

OUT

POWER-GOOD AND DELAY

V

Rising PG Threshold Voltage VFB rising 90 92 95 %

THPG

PG Threshold Hysteresis — 8 — %

PG Pull-low Voltage PG sinks 5mA — 0.25 0.4 V

PG Debounce Interval V

PG Delay Time From VFB = V

< falling PG voltage threshold — 10 — µs

FB

to rising edge of the VPG 1 2 4 ms

THPG

THERMAL CHARACTERISTIC

SO-8EP (Note 6) — 70 —

MSOP-8EP (Note 7) — 80 —

U-DFN3030-10 (Note 6) — 60 —

SO-8EP (Note 6) —

30 —

MSOP-8EP (Note 7) — 30 —

JA

JC

Thermal Resistance Junction-toAmbient

U-DFN3030-10 (Note 6) — 20 —

Notes: 5. Dropout voltage is the voltage difference between the input and the output at which the output voltage drops 2% below its nominal value.

6. Device mounted on 2"*2" FR-4 substrate PC board, 2oz copper, with minimum recommended pad on top layer and thermal vias to bottom layer ground plane.

7. Device mounted on 2"*2" FR-4 substrate PC board, 2oz copper,with minimum recommended pad layout.

AP7176B

Document number: DS35818 Rev.3 - 2

4 of 14

www.diodes.com

Unit

V

°C/W °C/W °C/W °C/W °C/W °C/W

April 2014

A

Typical Characteristics

P7176B

NEW PRODUCT

AP7176B

Document number: DS35818 Rev.3 - 2

5 of 14

www.diodes.com

April 2014