MAX1725(2003) View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX1725 Datasheet PDF : 7 Pages
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12V, Ultra-Low IQ, Low-Dropout
Linear Regulators
Typical Operating Characteristics (continued)
(VOUT = +3.3V, IOUT = 1mA, TA = +25°C, unless otherwise noted.)
DROPOUT VOLTAGE vs. LOAD CURRENT
300
250
TA = +85°C
200
TA = +25°C
150
100
50
TA = -40°C
0
0
5
10
15
20
LOAD CURRENT (mA)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
80
VIN = 5V
70
VOUT = 3.3V
RL = 3.3kΩ
60
COUT = 1µF
50
40
VIN
200mV/div
30
VOUT
20
20mV/div
10
0
0.01
0.1
1
10
100
FREQUENCY (kHz)
LINE-TRANSIENT RESPONSE
COUT = 1µF
IOUT = 1mA
100µs/div
IOUT
20mA/div
VOUT
100mV/div
LOAD TRANSIENT
COUT = 1µF
IOUT = 1mA - 20mA
TURN-ON/TURN-OFF RESPONSE
COUT = 1µF
IOUT = 1mA
VSHDN
2V/div
VOUT
1V/div
400µs/div
4ms
PIN
NAME
MAX1725 MAX1726
1
1
IN
2
2
GND
3
3
OUT
4
—
FB
—
4
GND
5
5
SHDN
Pin Description
FUNCTION
Supply Voltage Input
Ground
Voltage Output
Feedback Voltage Input
Ground
Active-Low Shutdown Input
Detailed Description
The MAX1725/MAX1726 are low-dropout, low-quiescent-
current linear regulators designed primarily for battery-
powered applications (Figure 1). The MAX1725 provides
an adjustable output voltage from 1.5V to 5V using an
external resistor-divider. The MAX1726 supplies preset
output voltages of 1.8V, 2.5V, 3.3V, or 5V. These devices
consist of a +1.245V error amplifier, MOSFET driver,
and P-channel pass transistor (Figure 2).
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