MAX1598 Datasheet, PDF (1/9 Pages) Maxim Integrated Products – Low-Noise, Low-Dropout, 200mA Linear Regulator

19-2584; Rev 0; 10/02
Low-Noise, Low-Dropout, 200mA
Linear Regulator
General Description
The MAX1598 low-noise, low-dropout linear regulator
operates from a 2.5V to 6.5V input and delivers up to
200mA. Typical output noise is 30µV_RMS, and typical
dropout is only 236mV at 200mA. The output voltage is
preset to voltages from 2.5V to 5V in 100mV increments.
Designed with an internal P-channel MOSFET pass
transistor, the MAX1598 maintains a low 100µA supply
current independent of the load current and dropout
voltage. Other features include a 10nA logic-controlled
shutdown mode, short-circuit and thermal-shutdown
protection, and reverse battery protection. The device
also includes an autodischarge function, which actively
discharges the output voltage to ground when the
device is placed in shutdown. The MAX1598 comes in
a thin 5-pin SOT23 package.
Features
o 200mA Output Current
o Low Output Noise: 30µV_RMS
o Low 55mV Dropout at 50mA Output
o Low 85µA No-Load Supply Current
o Low 100µA Operating Supply Current,
Even in Dropout
o Thermal-Overload and Short-Circuit Protection
o Reverse Battery Protection
o Output Current Limit
o Preset Output Voltages
o 10nA Logic-Controlled Shutdown
Applications
Cellular, Cordless, and PCS Phones
PCMCIA Cards
Modems
Hand-Held Instruments
Palmtop Computers
Electronic Planners
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX1598EZKxy-T* -40°C to +85°C Thin SOT23-5
*xy is the output voltage code (see the Selector Guide at end of
data sheet).
Typical Operating Circuit
INPUT
2.5V TO 6.5V
C_IN
1µF
IN
OUT
MAX1598
C_OUT
2.2µF
ON
OFF
SHDN
BP
C_BP
GND
0.01µF
OUTPUT
PRESET
2.5V TO 5V
200mA
Pin Configuration
TOP VIEW
IN 1
5 OUT
MAX1598
GND 2
SHDN 3
4 BP
THIN SOT23-5
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