Datasheet

MAX8530/MAX8531
Dual Low-Dropout Linear Regulators
with RESET or Low-Noise Output in UCSP or QFN
_______________________________________________________________________________________ 5
LOAD TRANSIENT
(V
IN
= 3.8V, I
LOAD
= 1mA TO 80mA)
MAX8530 toc12
I
LOAD
50mA/div
10μs/div
V
OUT
0
20mV/div
AC-COUPLED
Pin Description
PIN
MAX8530
(QFN)
MAX8531
(QFN)
MAX8530
(UCSP)
MAX8531
(UCSP)
NAME
FUNCTION
1 1 B3 B3
OUT2
Regulator 2 Output. Guaranteed 150mA output current.
2 2 B2 B2 IN Regulator Input
3 3 B1 B1
OUT1
Regulator 1 Output. Guaranteed 200mA output current.
4 4 A1 A1
GND
Ground. Also functions as a heatsink for the 6-pin QFN. Solder to a large
pad or the circuit board ground plane to maximize thermal dissipation.
5 5 A2 A2
SHDN
Shutdown Input. A logic low shuts down both regulators. Connect to IN
for normal operation.
6 — A3 —
RESET
Reset Active-Low Open-Drain Output. Minimum timeout of 100ms. RESET
is low in shutdown.
—6—A3BP
Reference Noise Bypass. Connect to a 0.01µF ceramic capacitor for
reduced noise at both outputs.
Typical Operating Characteristics (continued)
V
OUT1
= 3.3V, V
OUT2
= 1.5V, load = 80mA (both output voltages), V
IN
= 3.8V, C
OUT_
= 2.2µF, C
BP
= 0.01µF, C
IN
= 2.2µF, and T
A
= +25°C,
unless otherwise noted.
LOAD TRANSIENT NEAR DROPOUT
MAX8530 toc13
I
LOAD
50mA/div
10μs/div
V
OUT
0
20mV/div
AC-COUPLED
V
IN
= V
OUT
+ 0.1V
RESET RESPONSE
(MAX8530)
MAX8530 toc14
V
OUT-
2V/
div
40ms/div
V
IN
0
V
RESET
2V/
div
0
2V/
div
0
SHUTDOWN RESPONSE
MAX8530 toc15
V
OUT-
1V/
div
1ms/div
0
V
SHDN
2V/
div
0