MAX5091 Datasheet, PDF (1/15 Pages) Maxim Integrated Products – 28V, 100mA, Low-Quiescent-Current LDO with Reset and Power-Fail Input/Output

19-0654; Rev 0; 11/06
28V, 100mA, Low-Quiescent-Current LDO
with Reset and Power-Fail Input/Output
General Description
The MAX5091 high-voltage linear regulator is designed
to operate from a +5V to +28V input voltage, and with-
stands up to 40V transients. The device consumes only
45µA of quiescent current at 100µA output current. The
MAX5091 delivers up to 100mA of output current with
low 50mV maximum dropout voltage. The MAX5091
provides an active-low open-drain microprocessor
RESET output. The reset timeout period is programma-
ble and can be set with an external capacitor. The
MAX5091 includes an uncommitted comparator for
input voltage monitoring/power-fail indication. The
device is available with a fixed +5V (MAX5091A) or
+3.3V (MAX5091B) output. The MAX5091 is short-cir-
cuit protected and includes thermal shutdown.
The MAX5091 operates over the -40°C to +125°C auto-
motive temperature range and is available in 8-pin,
thermally enhanced TDFN and SO-EP packages.
Applications
Automotive
Home Security/Safety
Industrial
Telecom/Networking
Features
♦ +5V to +28V Wide Operating Input Voltage Range
♦ Withstands 40V Input Voltage Transients
♦ Guaranteed 100mA Output Current
♦ 45µA Typical Quiescent Current at 100µA Output
Current
♦ Preset +5V (MAX5091A) or +3.3V (MAX5091B)
Output Voltage
♦ Stable with Only 10µF Output Capacitance
♦ RESET Output with Adjustable Timeout Period
♦ Uncommitted Comparator for Voltage
Monitoring/Power-Fail Indication
♦ Output Overload and Short-Circuit Protection
♦ Thermal Shutdown
♦ Available in 8-Pin TDFN (1.95W at T_A = +70°C) and
8-Pin SO (1.5W at T_A = +70°C)
♦ Operates Over -40°C to +125°C Automotive
Temperature Range
Ordering Information
PART
PIN-
PACKAGE
PRESET V_OUT
(V)
MAX5091AATA+T
8 TDFN-8
5
MAX5091AASA+
8 SO-EP*
5
MAX5091BATA+T
8 TDFN-8
3.3
MAX5091BASA+
8 SO-EP*
3.3
Note: All devices specified for -40°C to +125°C operating temperature range.
+Denotes lead-free package. *EP = Exposed paddle.
Typical Application Circuit
PKG
CODE
T833-2
S8E-14
T833-2
S8E-14
TOP
MARK
+APB
—
+APC
—
Pin Configurations
+5V TO +28V
V_IN
RH
288kΩ
CIN
10μF
ON
OFF
RL
100kΩ
CCT
0.1μF
V_S
V_OUT
MAX5091
EN
SI
RES
CT
SO
GND
+5V (MAX5091A)/
+3.3V (MAX5091B)
100mA
RRES
10kΩ
COUT
10μF
RSO
10kΩ
μC
RESET
POWER-
FAIL
TOP VIEW
V_OUT SO RES GND
8765
MAX5091
EXPOSED PADDLE
+
1 234
V_S SI EN CT
TDFN
(3mm x 3mm)
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
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