MAX1658 Maxim, MAX1658 Datasheet - Page 5

• Manufacturer Part Number: MAX1658
• Description: 350mA / 16.5V Input / Low-Dropout Linear Regulators
• Manufacturer: Maxim

______________________________________________________________Pin Description
(V
otherwise noted.)
____________________________Typical Operating Characteristics (continued)
3, 6, 7
PIN
4, 5
IN
1
2
8
= 5V (MAX1658), V
10Hz TO 100kHz NOISE, V
A
B
NAME
SHDN
GND
OUT
SET
IN
A: OUTPUT VOLTAGE (1V/div)
B: SHDN PIN VOLTAGE (2V/div)
MAX1658 OVERSHOOT AND
TIME EXITING SHUTDOWN
_______________________________________________________________________________________
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
IN
OUTPUT NOISE
= 6V (MAX1659); SHDN = IN; SET = GND; C
100 s/div
OUT
10ms/div
= 5V (1mV/div), I
MAX1658/59TOC14
OUT
= 165mA
Low-Dropout Linear Regulators
3.3V
0V
FUNCTION
IN
= 0.1µF; C
350mA, 16.5V Input,
10
10
10
10
4
3
2
A
B
10
A: OUTPUT VOLTAGE (2V/div)
B: SHDN PIN VOLTAGE (2V/div)
OUT
MAX1659 OVERSHOOT AND
TIME EXITING SHUTDOWN
= 10µF tantalum; T
OUTPUT NOISE DENSITY
vs. FREQUENCY
FREQUENCY (Hz)
100 s/div
V
I
OUT
OUT
= 165mA
MAX1658/59TOC15
= 5V
A
= +25°C; unless
50k
5V
0V
5