GM6155-2.5ST25R GAMMA [Gamma Microelectronics Inc.], GM6155-2.5ST25R Datasheet

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GM6155-2.5ST25R

Manufacturer Part Number
GM6155-2.5ST25R
Description
150mA LOW-NOISE LDO REGULATOR
Manufacturer
GAMMA [Gamma Microelectronics Inc.]
Datasheet

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Part Number:
GM6155-2.5ST25R
Manufacturer:
GAMMA
Quantity:
20 000
Part Number:
GM6155-2.5ST25RG
Manufacturer:
GAMMA
Quantity:
20 000
Description
GM6155 is an efficient linear voltage regulator with ultralow
- noise output, very low dropout voltage (typically 17mV at
light loads and 165mV at 50mA), and very low ground cur-
rent (600µA at 100mA output). GM6155 provides better
than 1% initial accuracy.
Designed especially for hand-held, battery-powered de-
vices, GM6155 includes a CMOS or TTL compatible en-
able/ shutdown control input. When shutdown, power con-
sumption drops nearly to zero. Regulator ground current in-
creases only slightly in dropout, further prolonging battery
life. Key features of GM6155 include a reference bypass
pin to improve its excellent low-noise performance, re-
versed-battery protection, current limiting, and over-
temperature shutdown.
The GM6155 is available in SOT-25 package.
Application
TYPICAL APPLICATION CIRCUITS
Cellular telephones
Laptop, notebook, and palmtop computers
Battery-powered equipment
PCMCIA V
EN (pin 3) may be connected
directly to IN (pin1).
CC
and V
Shutdown
Enable
V
PP
IN
regulation/ switching
EN
1
2
3
5
4
C
BYP
Features
Consumer/ personal electronics
SMPS post-regulator/ dc-to-dc modules
High-efficiency linear power supplies
Ultra low noise output
High output voltage accuracy
Extremely accurate output voltage
Guaranteed 150mA output
Low quiescent current
Low dropout voltage
Extremely tight load and line regulation
Very low temperature coefficient
Current and thermal limiting
Reverse-battery protection
"Zero" off-mode current
Logic-controlled electronic enable
C
OUT
(tantalum)
V
= 2.2µF
OUT
Low-Noise Operation:
C
Basic Operation:
C
BYP
BYP
www.gammamicro.com
= 470pF, C
= not used, C
OUT
OUT
2.2µF
1µF
1

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GM6155-2.5ST25R Summary of contents

Page 1

... When shutdown, power con- sumption drops nearly to zero. Regulator ground current in- creases only slightly in dropout, further prolonging battery life. Key features of GM6155 include a reference bypass pin to improve its excellent low-noise performance, re- versed-battery protection, current limiting, and over- temperature shutdown ...

Page 2

... SOT-25 (SOT-23-5) OUT 5 XXVYW 1 IN GND EN Fixed Voltages ORDERING INFORMATION Ordering Number GM6155-AST25R GM6155-2.5ST25R GM6155-2.7ST25R GM6155-2.8ST25R GM6155-2.9ST25R GM6155-3.0ST25R GM6155-3.3ST25R GM6155-3.6ST25R GM6155-4.0ST25R GM6155-4.2ST25R GM6155-5.0ST25R * For detail Ordering Number identification, please see last page. ...

Page 3

BLOCK DIAGRAM BYP C BYP + (Optional) Bandgap - EN Current Limit Thermal Shutdown Figure 1. Ultra-Low-Noise Fixed Regulator ABSOLUTE MAXIMUM RATINGS PARAMETER Supply Input Voltage Enable Input Voltage Power Dissipation (Note 3) Junction Temperature Lead Temperature ...

Page 4

ELECTRICAL CHARACTERISTICS ( 1V 100µ 1.0µ OUT L unless otherwise noted) Parameter Output Voltage Accuracy Output Voltage Temperature Coefficient Line Regulation Load Regulation Dropout Voltage (Note 6) Quiescent Current Ground Pin ...

Page 5

... No-Load Stability GM6155 will remain stable and in regulation with no load (other than the internal voltage divider) unlike many other voltage regulators. This is especially important in CMOS RAM keep-alive applications. Thermal Considerations Gm6155 is designed to provide 150mA of continuous current in a very small package ...

Page 6

... EN (pin 3) connected to IN (pin 1) for an application where enable/ shutdown is not required 2.2µF minimum. OUT Adjustable Regulator Applications The GM6155 can be adjusted to a specific output voltage by using two externa resistors (Figure 5). The resistors set the output voltage based on the following equation Recommended ...

Page 7

This equation is correct due to the configuration of the bandgap reference. The bandgap voltage is relative to the output, as seen in the block diagram. Traditional regulators normally have the reference voltage relative to ground and have a different ...

Page 8

SOT-25(SOT-23-5) PACKAGE OUTLINE DIMENSIONS 2.9 ± 0.1 1.9 ± 0.05 0.95 ± 0.038 2.8 ± 0.1 0.35 ± 0.03 5° ORDERING NUMBER GM 6155 A ST25 R Gamma Micro. Circuit Type 8 0.13 0~0.1 1.5 ± 0.05 0.65 ± 0.05 ...

Page 9

9 ...

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