MAX16922 View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX16922 Datasheet PDF : 18 Pages
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MAX16922
EVALUATION KIT AVAILABLE
2.2MHz, Dual, Step-Down DC-DC
Converters, Dual LDOs, and RESET
General Description
The MAX16922 power-management integrated circuit
(PMIC) is designed for medium-power-level automotive
applications, and integrates multiple supplies in a small
footprint. The device includes one high-voltage step-
down converter (OUT1) and three low-voltage cascaded
DC-DC converters (OUT2, OUT3, OUT4). OUT1 and
OUT2 are step-down DC-DC converters, and OUT3/
OUT4 are linear regulators. The device also includes
a reset output (RESET) and a high-voltage-compatible
enable input (EN).
The 1.2A output high-efficiency, step-down DC-DC con-
verter (OUT1) operates from a voltage up to 28V con-
tinuous and is protected from load-dump transients up to
45V. The 600mA output high-efficiency step-down DC-DC
converter (OUT2) runs from a voltage up to 5.5V. The two
300mA LDO linear regulators offer low dropout of only
130mV (typ). The power-good RESET output provides
voltage monitoring for OUT1 and OUT2.
OUT1 and OUT2 use fast 2.2MHz PWM switching and
small external components. The high-voltage converter
(OUT1) enters skip mode automatically under light loads
to prevent an overvoltage condition from occurring at the
output. The low-voltage synchronous DC-DC converter
(OUT2) can operate in forced-PWM mode to prevent any
AM band interference or high-efficiency auto-PWM mode.
The MAX16922 includes overtemperature shutdown and
overcurrent limiting. The device is designed to operate
from -40°C to +125°C ambient temperature.
Ordering Information appears at end of data sheet.
Benefits and Features
●● 1.2A High-Efficiency 2.2MHz DC-DC Converter
• 3.7V to 28V Operating Supply Voltage
• 45V Load-Dump Protection
• Output Voltage: 3.0V to 5.5V
●● 600mA High-Efficiency 2.2MHz DC-DC Converter
• 2.7V to 5.5V Supply Voltage
• Output Voltage: 1.0V to 3.9V
• 180° Out-of-Phase Operation
• Forced-PWM and Auto-PWM Modes
●● LDO Linear Regulators
• OUT3: 1.0V to 4.15V at 300mA
• OUT4: 1.0V to 4.15V at 300mA
• Separate Inputs for Increased Efficiency
●● Enable Input
●● RESET Output Monitoring on OUT1 and OUT2
●● Overtemperature and Short-Circuit Protection
●● Available in
5mm x 5mm x 0.8mm, 20-Pin TQFN-EP
4.5mm x 6.5mm, 20-Pin TSSOP-EP
Typical Operating Circuit
VPV1
4.7µF
VOUT1
4.7µF
VOUT3
4.7µF
VOUT2
4.7µF
VOUT4
4.7µF
PV1
OUTS2
EN
LX2
PWM
PV3
PGND2
PV2
MAX16922
BST
OUT3
GND1
GND3
PV4
LX1
OUTS1
OUT4
GND
GND2
LSUP
EP
RESET
2.2µH
VOUT2
10µF
4.7µF
0.1µF
4.7µH
VOUT1
10µF
VOUT1
1µF
20kΩ
19-5039; Rev 11; 6/18
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