Datasheet
General Description
The MAX5087 high-voltage linear regulator operates
from an input voltage of 6.5V to 45V and delivers up
to 400mA of output current. The device consumes only
70μA of quiescent current with no load and 11μA in
shutdown. The device includes a SET input, that when
connected to ground, selects a preset output voltage of
3.3V (MAX5087A) or 5.0V (MAX5087B). Alternatively, the
output voltage can be adjusted from 2.5V to 11V by simply
connecting SET to the regulator’s output through a resis-
tive divider network. The MAX5087 also provides an open-
drain, active-low microprocessor (μP) reset output that
asserts when the regulator output drops below the preset
output voltage threshold. An external capacitor programs
the reset timeout period. Other features include an enable
input, thermal shutdown, and short-circuit protection.
The MAX5087 operates over the automotive temperature
range of -40°C to +125°C and is available in a 16-pin
TQFN thermally enhanced package.
Applications
● Industrial
● Home Security/Safety
● Networking
Features
● Wide Operating Input Voltage Range (6.5V to 45V)
● Thermally Enhanced Package Dissipates
2.6W at T
A
= +70°C (16-Pin TQFN)
● Guaranteed 400mA Output Current
● 70μA Quiescent Supply Current
● Preset 3.3V, 5.0V, or Adjustable 2.5V to 11V Output
Voltage
● Remote Load Sense Capability
● Enable Input
● Integrated μP Reset Circuit with Programmable
Timeout Period
● Thermal and Short-Circuit Protection
● -40°C to +125°C Operating Temperature Range
19-3964; Rev 6; 5/14
Note: All devices are specified over the -40°C to +125°C oper-
ating temperature range.
*EP = Exposed paddle.
+Denotes lead-free package.
PART PIN-PACKAGE
OUTPUT
VOLTAGE (V)
MAX5087AATE+ 16 TQFN-EP* 3.3
MAX5087BATE+ 16 TQFN-EP* 5.0
MAX5087BATE/V+ 16 TQFN-EP* 5.0
12 11 10 9
5
6
7
8
OUT
OUT
OUTSENSE
GND
TOP VIEW
16
15
14
13
N.C.
+
N.C.
N.C.
N.C.
1 2 3 4
EN
N.C.
IN
IN
MAX5087
N.C.
CT
RESET
SET
TQFN
MAX5087 45V, 400mA, Low-Quiescent-Current
Linear Regulator with Adjustable Reset Delay
Ordering Information
Pin Conguration
EVALUATION KIT AVAILABLE