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DATASHEET
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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40V, Low Quiescent Current, 50mA Linear Regulator
ISL80136
The ISL80136 is a high voltage, low quiescent current linear
regulator ideally suited for “always-on” and “keep alive”
applications. The ISL80136 operates from an input voltage of
+6V to +40V under normal operating conditions, consuming
only 18µA of quiescent current at no load.
The ISL80136 offers adjustable output voltages from 2.5V to
12V. It features an EN pin that can be used to put the device
into a low-quiescent current shutdown mode where it draws
only 1.8µA of supply current. The device features over-
temperature shutdown and current limit protection.
The ISL80136 is rated over the -40°C to +125°C temperature
range and is available in an 8 lead EPSOIC with an exposed
pad package.
Features
•Wide V
IN
range of 6V to 40V
• Adjustable output voltage from 2.5V to 12V
• Guaranteed 50mA output current
• Ultra low 18µA typical quiescent current
• Low 1.8µA of typical shutdown current
• ±1% accurate voltage reference
• Low dropout voltage of 120mV at 50mA
• 40V tolerant logic level (TTL/CMOS) enable input
• Stable operation with 10µF output capacitor
• 5kV ESD HBM rated
• Thermal shutdown and current limit protection
Applications
•Industrial
•Networking
• Telecom
Related Literature
• ISL80138, “40V, Low Quiescent Current, 150mA Linear
Regulator”
• AN1784, “ISL80136EVAL1Z, ISL80138EVAL1Z Evaluation
Boards User Guide”
TABLE 1. KEY DIFFERENCES IN FAMILY OF 40V LDO PARTS
PART NUMBER MINIMUM I
OUT IC PACKAGE
ISL80136 50mA 8 Ld EPSOIC
ISL80138 150mA 14 Ld HTSSOP
FIGURE 1. TYPICAL APPLICATION
FIGURE 2. QUIESCENT CURRENT vs LOAD CURRENT (AT UNITY
GAIN), V
IN
= 14V
IN
OUT
EN
ADJ
GND
C
IN
0.1µF
C
OUT
10µF
R1
R2
0
10
20
30
40
50
60
70
-50 0 50 100 150
TEMPERATURE (°C)
QUIESCENT CURRENT (µA)
LOAD = 50mA
LOAD = 0mA
August 11, 2015
FN7970.2
