SGM2122
Dual, Low Dropout,
250mA LDO Regulators
GENERAL DESCRIPTION
FEATURES
The SGM2122 is a dual, low-power, low-dropout, CMOS
linear voltage regulator. It operates from a 2.5V to 5.5V
input and delivers up to 250mA at each channel.
Highly Accurate: ±2%
Ultra-Low Dropout Voltage:
250mV at 250mA Output
190µA No-Load Supply Current
Quick Auto-Discharge in Shutdown Status
Thermal-Overload Protection
Output Current Limit
The SGM2122 is the perfect choice for low voltage, low
power. The ground current is 190μA (both LDO’s enabled
and active) that makes this part attractive for battery
operated power systems. The SGM2122 also offers low
dropout voltage (250mV at 250mA output) to prolong
battery life in portable electronics.
10nA Logic-Controlled Shutdown
Operating Temperature Range: -40℃ to +85℃
Small Package
Separate enable pins control each individual LDO output.
The EN function allows the output of each regulator to be
turned off independently, resulting in greatly reduced
power consumption. Other features include a 10nA
logic-controlled shutdown mode, foldback current limit
and thermal shutdown protection.
PIN CONFIGURATION (TOP VIEW)
SGM2122
OUT2
GND
EN2
6
5
4
OUT1
IN
1
2
3
EN1
The SGM2122 is available in Green SOT-23-6 package.
It operates over an ambient temperature range of -40℃
SOT-23-6
to +85℃.
NOTE: The location of pin 1 on the SGM2122 is determined by
orienting the package marking as shown.
APPLICATIONS
Cellular Telephones
Cordless Telephones
PCS Telephones
TYPICAL APPLICATION CIRCUIT
OUTPUT2
OUTPUT1
1
2
3
6
5
4
OUT2
GND
OUT1
IN
PCMCIA Cards
1μF
1μF
Modems
INPUT
MP3 Player
1μF
Hand-Held Instruments
Palmtop Computers
Wireless LAN
SGM2122
ON
ON
EN2
EN1
OFF
OFF
Portable/Battery-Powered Equipment
REV. A. 4
SG Micro Corp
www.sg-micro.com