Rainbow Electronics MAX16910 User Manual
Page 10
200mA, Automotive, Ultra-Low
Quiescent Current, Linear Regulator
MAX16910
10 _____________________________________________________________________________________
Functional Diagram
_______________Detailed Description
The MAX16910 low-quiescent current, high-voltage lin-
ear regulator is ideal for use in automotive and battery-
operated systems. The device operates from an input
voltage of +3.5V to +30V, delivers up to 200mA of load
current, and consumes only 20µA of quiescent current
at no load. The input is +45V tolerant and is designed
to operate under load-dump conditions. The MAX16910
can be user configured as either a fixed output voltage
(+3.3V or +5V) or an adjustable output voltage using an
external resistive divider.
The MAX16910 features an open-drain, active-low
RESET output with fixed thresholds offered at 92.5%
and 87.5% of the output voltage. The RESET output
remains low for a fixed period of 60µs after the output
voltage exceeds its threshold. The RESET delay can be
extended with an external capacitor. The MAX16910
includes an enable input short-circuit protection and
thermal shutdown.
Fixed Output-Voltage Mode
The SET and SETOV inputs determine the output mode.
For the 5V fixed output-voltage mode (see the 5V fixed
output circuit in the Typical Operating Circuits), con-
nect SET to GND and SETOV to OUT. For the 3.3V fixed
output-voltage mode (see the 3.3V fixed output circuit
in the Typical Operating Circuits) connect SET to GND
and SETOV to GND.
Adjustable Output-Voltage Mode
For the adjustable output-voltage mode (see the adjust-
able output circuit in the Typical Operating Circuits),
connect SET to IN or a voltage > 2.4V and connect
SETOV to a resistive divider R1 and R2 between OUT
and GND. An output voltage between 1.5V and 11V can
be selected using the following equation:
V
OUT
= V
SETOV
x (1 + R1/R2)
where V
SETOV
= 1.25V and R2 should be less than or
equal to 100kω.
MAX16910
1.253V
ENABLE
IN
1.156V (92.5%)
or
1.094V (87.5%)
OVERCURRENT
PROTECTION
THERMAL
PROTECTION
CONTROL
LOGIC
RESET
TIMEOUT
OUTPUT-
VOLTAGE
SELECT MUX
GND
TIMEOUT
RESET
SETOV
SET
OUT