MAX1658 Datasheet, PDF (5/12 Pages) Maxim Integrated Products – 350mA, 16.5V Input, Low-Dropout Linear Regulators

350mA, 16.5V Input,
Low-Dropout Linear Regulators
____________________________Typical Operating Characteristics (continued)
(V_IN = 5V (MAX1658), V_IN = 6V (MAX1659); SHDN = IN; SET = GND; C_IN = 0.1µF; C_OUT = 10µF tantalum; T_A = +25°C; unless
otherwise noted.)
MAX1658 OVERSHOOT AND
TIME EXITING SHUTDOWN
MAX1658/59TOC14
MAX1659 OVERSHOOT AND
TIME EXITING SHUTDOWN
MAX1658/59TOC15
3.3V
5V
A
0V
A
0V
B
100µs/div
A: OUTPUT VOLTAGE (1V/div)
B: SHDN PIN VOLTAGE (2V/div)
OUTPUT NOISE
B
100µs/div
A: OUTPUT VOLTAGE (2V/div)
B: SHDN PIN VOLTAGE (2V/div)
OUTPUT NOISE DENSITY
vs. FREQUENCY
10⁴
10³
10ms/div
10Hz TO 100kHz NOISE, V_OUT = 5V (1mV/div), I_OUT = 165mA
10²
10
10
V_OUT = 5V
I_OUT = 165mA
50k
FREQUENCY (Hz)
______________________________________________________________Pin Description
PIN NAME
1
SET
2
3, 6, 7
SHDN
IN
4, 5
OUT
8
GND
FUNCTION
Output Voltage Input. Connecting SET to ground selects the factory-preset 3.3V (MAX1658) or 5V
(MAX1659) output voltage. For an adjustable output voltage, connect SET to a resistive voltage divider from
OUT to GND.
Shutdown Input. When SHDN is low, the device turns off and typically draws 0.1µA of supply current.
Unregulated Input Supply Voltage, 2.7V to 16.5V input range. The IN pins also serve as heatsinks. Connect
to a copper plane to achieve maximum thermal dissipation.
Regulated Output Voltage. Fixed or adjustable from 1.25V to 16V. Sources up to 350mA. For stable opera-
tion, bypass with a 10µF, low-ESR (<0.2Ω) capacitor from OUT to GND. For improved load-transient
response, use a larger low-ESR capacitor.
Ground
_______________________________________________________________________________________ 5