MAX16952 Datasheet, PDF (1/24 Pages) Maxim Integrated Products – 36V, 2.2MHz Step-Down Controller with Low Operating Current

EVALUATION KIT AVAILABLE
MAX16952
36V, 2.2MHz Step-Down Controller
with Low Operating Current
General Description
The MAX16952 is a current-mode, synchronous PWM
step-down controller designed to operate with input volt-
ages from 3.5V to 36V while using only 50µA of quies-
cent current at no load. The switching frequency is
adjustable from 1MHz to 2.2MHz by an external resistor
and can be synchronized to an external clock up to
2.4MHz. The MAX16952 output voltage is pin program-
mable to be either 5V fixed, or adjustable from 1V to 10V.
The wide input voltage range, along with its ability to
operate in dropout during undervoltage transients,
makes it ideal for automotive and industrial applications.
The MAX16952 operates in fixed-frequency PWM mode
and low quiescent current skip mode. It features an
enable logic input, which is compatible up to 42V to dis-
able the device and reduce its shutdown current to
10µA. Protection features include overcurrent limit, over-
voltage, undervoltage, and thermal shutdown with auto-
matic recovery. The device also features a power-good
monitor to ease power-supply sequencing.
The MAX16952 is available in a thermally enhanced
16-pin TSSOP package with an exposed pad, and is
specified for operation over the -40°C to +125°C automo-
tive temperature range.
Applications
Automotive
Industrial
Military
Point of Load
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX16952AUE/V+ -40°C to +125°C
16 TSSOP-EP*
/V denotes an automotive qualified part.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Features
o Wide 3.5V to 36V Input Voltage Range
o 42V Input Transient Tolerance
o High Duty Cycle During Undervoltage Transients
o 1MHz to 2.2MHz Adjustable Switching Frequency
o Adjustable (1V to 10V) Output Voltage with ±2%
Accuracy
o Three Operating Modes
50µA Ultra-Low Quiescent Current Skip Mode
Forced Fixed-Frequency Mode
External Frequency Synchronization
o Lowest BOM Count, Current-Mode Control
Architecture
o Power-Good Output
o Enable Input Compatible from 3.3V Logic Level to
42V
o Current-Limit, Thermal Shutdown, and
Overvoltage Protection
o -40°C to +125°C Automotive Temperature Range
o Automotive Qualified
Typical Operating Circuit
VBAT
CIN
RCOMP _CCOMP2
CCOMP1
SUP
COMP
DH
CBST
BST
LX
MAX16952
NH
L
RFOSC
PGOOD
EN
FSYNC
FOSC
SGND
DL
PGND
CS
OUT
FB
BIAS
NL
RSENSE
COUT
VOUT
5V
CL
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-5789; Rev 1; 10/12