TYPICAL OPERATION CIRCUIT
INPUT
INPUT
2.5V TO 5.5V
2.5V TO 5.5V
OUTPUT
OUTPUT
OUT
OUT
IN
IN
COUT
1μF
CIN
1μF
CIN
1μF
COUT
1μF
SG2003
SG2004
SG2003A
SG2004A
R1
R2
ON
ON
FB
EN
EN
BP
OFF
OFF
CBP
0.01μF
GND
GND
Adjustable Voltage Version
Fixed Voltage Version
Standard 1% Resistor Values for Common
Output Voltages of Adjustable Voltage Version
R1(kΩ)
13
28
63.4
78.7
80.6
88.7
95.3
R2(kΩ)
VOUT(V)
1.5
61.9
61.9
61.9
61.9
61.9
61.9
57.6
1.8
2.5
2.8
2.85
3.0
3.3
Note: VOUT = (R1 + R2)/ R2 × 1.2395
PIN DESCRIPTION
SOT23-5
PIN
SO-8
PIN
2
NAME
FUNCTION
Regulator Input. Supply voltage can range from 2.5V to 5.5V. Bypass with a 1µF capacitor to GND.
IN
1
Ground.
GND
2
5,6,7,8
Shutdown Input. A logic low reduces the supply current to 10nA. Connect to IN for normal
operation.
Reference-Noise Bypass(fixed voltage version only). Bypass with a low-leakage 0.01µF ceramic
capacitor for reduced noise at the output.
EN
BP
3
4
1
4
Adjustable voltage version only—this is used to set the output voltage of the device.
Regulator Output.
FB
OUT
4
5
4
3
４
SG2003/A
SG2004/A
SGMICRO [ Shengbang Microelectronics Co, Ltd ]
