GM6355
300mA LOW NOISE CMOS LDO
WITH ENABLE FUNCTION
Description
The GM6355 series is a low-dropout linear
regulator. It is designed specifically for battery-
operated systems with the ground current as low
as 50μA typical. This feature significantly extends
the battery life. Low power consumption and high
accuracy is achieved through CMOS and
programmable fuse technologies.
GM6355 offers adjustable output option with VREF
= 0.9V as well fixed output voltages including from
0.9V to 6.0V with 0.1V increment.
GM6355 consists of a high-precision voltage
reference, an error correction circuit, and a
current limited output driver. With good transient
responses, output remains stable even during
load changes.
With its high ripple rejection ratios, this series can
be used with power supply noise. A 470pF
capacitor from the bypass (BY) input to ground
reduces noise presenting on the internal
reference, which in turn significantly reduces
output noise. If output noise is not a concern, this
input may be left unconnected. However, to use
larger capacitor values Cbp it will result in a longer
time to rated output voltage when power is initially
applied.
GM6355 incorporates both over-temperature and
over-current protection. SOT23-5 (300mW)
packages is available.
Maximum output current: 300mA
Minimum output voltage as low as
0.9V
High output voltage accuracy: ± 1.5%
Low power consumption
On chip thermal and short circuit
protections
Low dropout voltage – 300mV @
300mA
Minimum input voltage 2.0V
Application
Battery operated systems
Portable computers
Portable cameras and video recorders
Reference voltage sources
Instruments
Pagers
Typical Application Circuits
VIN
Enable
EN
Shutdown
GM6355-x.x
1
5
2
3
4 BP
CBP
VOUT
VIN
COUT = 1µF
Enable
EN
Shutdown
GM6355-Adj
1
5
VOUT = VREF (1+ R1/R2)
COUT = 1µF
2
R1
Adj
3
4
R2
Figure 1 Fixed output version
Figure 2. Adjustable output version
Note: EN (Pin 3) maybe connected directly to VIN (Pin1)
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