MAX4836 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – 500mA LDO Linear Regulators with Current-Limiting Switch

19-3374; Rev 0; 7/04
500mA LDO Linear Regulators with
Current-Limiting Switch
General Description
The MAX4836/MAX4837 family of low-dropout (LDO)
linear regulators feature an accurate current-limiting
switch with an integrated FLAG or RESET function. These
devices operate from 2.5V to 5.5V and deliver up to
500mA of load current at a preset output voltage. Preset
output voltage levels are 1.8V/2.5V/2.8V/3.0V/3.3V.
The MAX4836/MAX4837 offer a programmable soft-
start control function to eliminate false reset during
startup. The MAX4836 provides a FLAG function to noti-
fy the system when the load current exceeds the limit.
The MAX4837 provides a RESET function to notify the
system when the output drops below the threshold.
Additionally, reverse-current protection prevents cur-
rent flowing from the output to the input. Other features
include a low 90µA quiescent current, a 0.1µA shut-
down current.
The MAX4836/MAX4837 are available in space-saving
6-pin SOT23 and TDFN packages. Each device is speci-
fied over the -40°C to +85°C extended temperature
range. Contact factory for other programmed output volt-
age versions from 1.5V to 3.3V in 100mV increments.
For pin-compatible 100mA versions of this device, refer
to the MAX4832/MAX4833. For pin-compatible 250mA
versions of this device, refer to the MAX4834/MAX4835.
Applications
SDIO Ports and Devices
Notebook Computers
USB Ports and Devices
Cell Phones
PDAs and Palmtop Devices GPS Systems
TOP VIEW
Pin Configurations
IN 1
GND ²
SHDN ³
MAX4836/MAX4837
EXPOSED PADDLE
6 OUT
5 SS
4 RESET
(FLAG)
TDFN
( ) MAX4836ETTxyC ONLY.
Pin Configurations continued at end of data sheet.
Features
♦ Guaranteed Minimum 500mA Load Current
♦ Accurate Current Limit
♦ Preset Output Voltages: 1.8V/2.5V/2.8V/3.0V/3.3V
♦ 2.5V to 5.5V Supply Voltage Range
♦ Adjustable Soft-Start
♦ Low Dropout Voltage
♦ Thermal Shutdown
♦ Reverse-Current Protection
♦ Shutdown Output Discharge (MAX4837)
♦ Low 90µA Supply Current
♦ Ultra-Low 0.1µA Shutdown Current
♦ FLAG and Latch Off (MAX4836) or RESET
(MAX4837)
♦ Tiny SOT23 and TDFN (3mm x 3mm) Packages
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX4836EUTxy_-T*
-40°C to +85°C 6 SOT23-6
MAX4836ETTxy_-T
-40°C to +85°C 6 TDFN-6
MAX4837EUTxy_dd-T* -40°C to +85°C 6 SOT23-6
MAX4837ETTxy_dd-T -40°C to +85°C 6 TDFN-6
Note: “xy” are placeholders for the output voltage levels of the
devices. Insert the values found in Table 1 at the end of this doc-
ument in the place of “xy”. The “_” is a placeholder for either the
RESET or the FLAG feature. Insert “B” in the place of “_” for
RESET and “C” for FLAG. “dd” is a placeholder for the reset
timeout period. Insert the values found in Table 2 in the place of
“dd.” For example, MAX4837EUT18BD2 has a 1.8V output volt-
age, RESET feature, and a 30ms reset timeout period. Note that
“dd” applies only to the devices with RESET option and does not
apply to the devices with FLAG option. For devices with the
FLAG option, leave dd blank. Standard versions require a mini-
mum order increment of 2.5k units. Nonstandard versions must
be ordered in 10k unit increments. Contact factory for availability.
*Future product—contact factory for availability.
Tables 1 and 2 and Selector Guide appear at end of data
sheet.
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