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.
Features
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
Application
Cellular telephones
Laptop, notebook, and palmtop computers
Battery-powered equipment
PCMCIA V
CC
and V
PP
regulation/ switching
Consumer/ personal electronics
SMPS post-regulator/ dc-to-dc modules
High-efficiency linear power supplies
TYPICAL APPLICATION CIRCUITS
2
Enable
Shutdown
3
EN
GM6155-3.3
V
IN
1
5
V
OUT
4
C
BYP
EN (pin 3) may be connected
directly to IN (pin1).
Low-Noise Operation:
C
BYP
= 470pF, C
OUT
Basic Operation:
C
BYP
= not used, C
OUT
2.2µF
1µF
www.gammamicro.com
GM6155
V0.1
1
C
OUT
= 2.2µF
(tantalum)
GAMMA [ GAMMA MICROELECTRONICS INC. ]
