Diodes PAM3110 User Manual

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Description

The PAM3110 is a 1.5A CMOS LDO regulator that features a low

quiescent current and low dropout voltages, as well as over

temperature shutdown. The fixed output voltage of the PAM3110 is

set at the factory and trimmed to ±1.5%. The PAM3110 is stable with

a ceramic output capacitor of 4.7µF or higher.

This family of regulators can provide either a stand-alone power

supply solution or act as a post regulator for switch mode power

supplies. They are particularly suitable for applications requiring low

input and output voltages.

PAM3110 is available in SOT-223, TO-252 and TO-263-2L package.

Features

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Diodes Incorporated

PAM3110

1.5A LOW DROPOUT VOLTAGE CMOS REGULATOR

Pin Assignments

 DSP, FPGA and Microprocessor Power Supplies

 Output Voltages:1.2V, 1.5V,1.8V, 2.5V 3.3V and 5.0V

 Stable with a Ceramic Output Capacitor

 Dropout Voltage: 400mV@1.5A

 Low Quiescent Current

 Over Temperature Shutdown

 Short Circuit Protection

 Low Temperature Coefficient

 Pb-Free Packages

Applications

 DSP, FPGA and Microprocessor Power Supplies

 SATA Power Supply

 LCD TV/Monitors

 Wireless Devices

 Communication Devices

 Portable Electronics

 Post Regulator for SMS

PAM3110

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Typical Applications Circuit

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PAM3110

Pin Configuration and Description

Pin Name

VIN 3

EN 2

CTRL 4

POK 1

ADJ 7

VOUT 6

NC

GND

Exposed Pad (9)

Pin Number

SOP-8(EP) W-DFN3x3-10

7, 8, 9 Supply Input Voltage.

6 Chip Enable (Active-High).

10 Supply Voltage of ControlCircuitry.

5 Power Good Open Drain Output.

4

1, 2, 3 Output Voltage.

5

8,

— No Internal Connection.

Exposed Pad

(11)

Functional Block Diagram

Function

Set the output voltage by the feedback resistors. V

Ground. The exposed pad must be soldered to a large PCB and connected to GND formaximum powe r dissipation.

= 0.8V x (R1 + R2)/R2.

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PAM3110

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PAM3110

Absolute Maximum Ratings (@T

These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for prolonged time periods may affect device reliability. All voltages are with respect to ground.

Parameter Rating Unit

Input Voltage 6 V

Storage Temperature -65 to +150 °C

Maximum Junction Temperature 150 °C

Lead Soldering Temperature 300, (5sec) °C

Recommended Operating Conditions (@T

Parameter Rating Unit

Supply Voltage 2.5 to 5.5 V

Ambient Temperature Range -40 to +85

Junction Temperature Range -40 to +125

= +25°C, unless otherwise specified.)

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= +25°C, unless otherwise specified.)

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°C

Thermal Information

Parameter Symbol Package Max Unit

SOT-223 7

Thermal Resistance Junction to Case)

Thermal Resistance (Junction to Ambient)

Internal Power Dissipation (@TA = 25°C) PD

PAM3110

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TO-252 7

TO-263 7

SOT-223 160

TO-252 90

TO-263 60

SOT-223 625

TO-252 1200

TO-263 2000

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°C/W

mW

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PAM3110

Electrical Characteristics (@T

Parameter Symbol Test Conditions Min Typ Max Units

Input Voltage Range

Output Voltage Accuracy

Dropout Voltage

Short Circuit Current

Quiescent Current

Current Limit

Line Regulation LNR

Load Regulation LDR

Over Temperature Shutdown OTS 160 °C

Over Temperature Hysteresis OTH 30 °C

Temperature Coefficient

Power Supply Ripple Rejection PSRR

PAM3110

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= +25°C, VIN = VO +0.5V, V

A

IN

IO = 1mA to 1.5A

O

= 500mA VO ≥ 2.5V

I

O

IO = 1.5A VO ≥ 2.5V

VO < 0.3V

IO = 0mA

2 A

V

≤ 2.5V, IO = 10mA

O

= VO +1.5V to VO +2.5V

V

IN

V

DROP

I

SC

I

Q

I

LIM

VO > 2.5V, IO = 10mA

= VO +0.5V to VO +1.5V

V

IN

I

= 1mA to 1.5A

O

T

40 ppm/°C

C

I

= 100mA

O

= VEN = 5V, CIN = CO = 10µF, unless otherwise specified.)

CTRL

f = 100Hz 55

f = 1kHz 50

f = 10kHz 35

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2.5 5.5 V

-1.5 1.5 %

200

400

mV

500 mA

75 150 µA

0.5 1 %/V

0.5 1 %

dB

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