Diodes PAM3103 User Manual

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Description

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PAM3103

300mA ADJUSTABLE HIGH PSRR CMOS LINEAR REGULATOR

Pin Assignments

The PAM3103 is a positive, adjustable linear regulator. It features low
quiescent current (65µA typ.) and low dropout voltage, making it ideal
for battery powered applications. The output voltage is adjustable
from 1.2V through 5V. Its high PSRR makes it useful in applications
that require AC noise suppression on the input power supply. Space­saving TSOT25 and SOT353(SC70-5) packages are attractive for
portable and handheld applications. It has both thermal shutdown and
a current limit features to prevent device failure under extreme
operating conditions. It is stable with an output capacitor of 2.2µF or
greater.

Top View

TSOT25

Features

 Low Dropout Voltage: 180mV@ 300mA ( VO = 3.3V)
 Accuracy within ±2%
 Quiescent Current: 65µA Typ.
 High PSRR: 67dB@100Hz
 Excellent Line/Load Regulation
 Fast Response
 Current Limiting
 Short Circuit Protection
 Low Temperature Coefficient
 Shutdown Current: 0.5µA
 Thermal Shutdown
 Space Saving Packages TSOT25 and SOT353(SC70-5)
 Pb-Free Package

Applications

 Cordless Phone
 Cellular Phone
 Bluetooth Earphone
 Digital Camera
 Portable Electronics
 WLAN
 MP3 Player

Typical Applications Circuit

V

= V

O

PAM3103

Document number: DSxxxxx Rev. 1 - 5

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*(R1+R2)/R2

REF

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PAM3103

Pin Descriptions

Pin

Number

1 VIN
2 GND
3 EN
4 ADJ
5 VOUT

Pin

Name

Function

Input
Ground
Chip Enable (Active High)
Adjustable Pin
Output

Functional Block Diagram

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

Inout Voltage 6.0 V
Output Current 300 mA
Output Pin Voltage

Lead Soldering Temperature 300 °C
Storage Temperature -65 to +150 °C

PAM3103

Document number: DSxxxxx Rev. 1 - 5

= +25°C, unless otherwise specified.)

A

GND -0.3 to V

+0.3V

IN

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PAM3103

Recommended Operating Conditions (@T

= +25°C, unless otherwise specified.)

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Parameter Rating Unit

Supply Voltage Range 2.5 to 5.5 V
Junction Temperature -40 to +125

Operation Temperature -40 to +85

°C

Thermal Information

Parameter Symbol Package Max Unit

Thermal Resistance Junction to Case)

Thermal Resistance (Junction to Ambient)

Internal Power Dissipation

θ

JC

θ

JA

P

D

Electrical Characteristics (@T

= +25°C, VIN = 4V, VO = 3V, CIN = 1µF, CO = 2.2µF, unless otherwise specified.)

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Parameter Symbol Test Conditions Min Typ Max Units

Input Voltage
Output Voltage
Reference Voltage
Output Voltage Accuracy
Output Current
Short Circuit Current

Dropout Voltage

Ground Current
Quiescent Current

V

V

I

V
V

REF

V

I

I

SC

DROP

GND

I
Line Regulation LNR
Load Regulation LDR
Temperature Coefficient

T
Over Temperature Shutdown OTS
Over Temperature Hysteresis OTH

Power Supply Ripple Rejection PSRR

Output Noise
EN Input High Threshold
EN Input Low Threshold

Shutdown Current

Notes: 1. The minimym inout voltage (V
V
V

2. Output current is limited by P

IN(MIN)
IN(MIN)

= VO +V
= 2.5V

DROP

D

V

V
V
I

SD

) of the PAM3103 is determined by output voltage and dropout voltage. The minimum input voltage is defined as:

IN(MIN

, maximum IO = PD/(V

IN
O

IO = 1mA

O

300 Note 2 mA

O

VO = 0V

IO = 300mA

IO = 1mA to 300mA

IO = 0mA

Q

I

= 1mA, VIN = 3V to 5V

O

= 1mA to 300mA

I

O

40 Ppm/°C

C

= 1mA

I

O

I

= 1mA

O

= 100mA, VO = 1.2V

I

O

f = 10Hz to 100kHz 50

N

VIN 2.5V to 5V

IH

VIN 2.5V to 5V

IL

VEN = 0V

– VO).

IN(MAX)

PAM3103

Document number: DSxxxxx Rev. 1 - 5

TSOT25 130

SOT353(SC70-5) TBD

TSOT25 250

SOT353(SC70-5) 300

TSOT25 400

SOT353(SC70-5) 300

2.5V ≤ V

< 3.3V

O

VO ≥ 3.3V

f = 100Hz 67 dB
f = 1kHz 65 dB
f = 10kHz 42 dB

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°C/W

mW

Note 1 5.5 V

1.2 5 V

1.235 V

-2 2 %

150 mA
370 450
180 230

mV

70 90 µA
65 90 µA

-0.4 0.2 0.4 %/V

-1 0.2 1 %

150 °C
30 °C

µV

RMS

1.5 V

0.3 V

0.01 1 µA

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Typical Performance Characteristics (@T

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PAM3103

= +25°C, VO = 1.2V, CIN = 1µF, CO = 2.2µF, unless otherwise specified.)

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PAM3103

Document number: DSxxxxx Rev. 1 - 5

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