MAX16961 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – Synchronous Step-Down DC-DC Converter

MAX16961
3A, 2.2MHz, Synchronous Step-Down
DC-DC Converter
General Description
The MAX16961 is a high-efficiency, synchronous step-
down converter that operates with a 2.7V to 5.5V input
voltage range and provides a 0.8V to 3.6V output voltage
range. The wide input/output voltage range and the abil-
ity to provide up to 3A to load current make this device
ideal for on-board point-of-load and post-regulation
applications. The device achieves -3.7%/+2.6% output
error over load, line, and temperature ranges.
The device features a 2.2MHz fixed-frequency PWM
mode for better noise immunity and load transient
response, and a pulse-frequency modulation mode
(skip) for increased efficiency during light-load operation.
The 2.2MHz frequency operation allows for the use of all-
ceramic capacitors and minimizes external components.
The optional spread-spectrum frequency modulation
minimizes radiated electromagnetic emissions.
Integrated low R_DSON switches improve efficiency at
heavy loads and make the layout a much simpler task
with respect to discrete solutions.
The device is offered with factory-preset output voltages
or with an adjustable output voltage. (See the Selector
Guide for options). Factory-preset output-voltage
versions allow customers to achieve -3.7%/+2.6%
output-voltage accuracy without using external resistors,
while the adjustable output-voltage version provides the
flexibility to set the output voltage to any desired value
between 0.8V to 3.6V using an external resistive divider.
Additional features include 8ms soft-start, 16ms power-
good output delay, overcurrent, and overtemperature
protections.
The MAX16961 is available in thermally enhanced
16-pin TSSOP-EP and 16-pin (4mm x 4mm) TQFN-
EP packages, and is specified for operation over
the -40NC to +125NC automotive temperature range.
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part,
refer to www.maximintegrated.com/MAX16961.related.
Benefits and Features
S Small External Components
 2.2MHz Operating Frequency
S Ideal for Point-of-Load Applications
 3A Maximum Load Current
 Adjustable Output Voltage: 0.8V to 3.6V
 2.7V to 5.5V Operating Supply Voltage
S High Efficiency at Light Load
 26µA Skip Mode Quiescent Current
S Minimizes Electromagnetic Interference
 Programmable SYNC I/O Pin
 Operates Above AM-Radio Band
 Available Spread Spectrum
S Low Power Mode Saves Energy
 1µA Shutdown Current
S Open-Drain Power-Good Output
S Limits Inrush Current During Startup
 Soft-Start
S Overtemperature and Short-Circuit Protections
S 16-Pin TSSOP-EP and 16-Pin (4mm x 4mm)
TQFN-EP Packages
S -40°C to 125°C Operating Temperature Range
Applications
Automotive Infotainment
Point-of-Load Applications
Industrial/Military
Typical Application Circuit
V_PV1
4.7µF
VPV
10Ω
1µF
PV1
OUTS
PV2
LX1
EN
LX2
PGND1
PGND2
PV _MAX16961
GND
EP
PG
0.47µH
VOUT1
VOUT1
47µF
20kΩ
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-6520; Rev 3; 5/14