MAX16963 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – DC-DC Converter

MAX16963
Dual 2.2MHz, Low-Voltage Step-Down
DC-DC Converter
General Description
Benefits and Features
The MAX16963 is a high-efficiency, dual 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 device delivers up to 1.5A of load
current per output. The low input/output voltage range
and the ability to provide high output currents make this
device ideal for on-board point-of-load and postregulation
applications. The device achieves Q3% 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 skip mode for increased efficiency during light-load
operation. The 2.2MHz frequency operation allows for
an all-ceramic capacitor design and small-size external
components. An optional spread-spectrum frequency
modulation minimizes radiated electromagnetic emissions
due to the switching frequency.
On-board low R_DSON switches help minimize efficiency
losses at heavy loads and reduce critical/parasitic induc-
tance, making the layout a much simpler task with respect
to discrete solutions. Following a simple layout and footprint
ensures first-pass success in new designs.
The device is offered in a factory-preset output voltage or
adjustable output-voltage version (see the Selector Guide
for options). Factory-preset output-voltage versions allow
customers to achieve Q3% 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 and 3.6V using an external
resistive divider.
Additional features include 8ms fixed soft-start, 16ms
fixed power-good delay, overcurrent, and overtemperature
protections.
The MAX16963 is available in thermally enhanced 16-pin
TSSOP-EP and 4mm x 4mm, 16-pin TQFN-EP packages,
and is specified for operation over the -40NC to +125NC
automotive temperature range.
Applications
S Small Size Components
 Dual 2.2MHz DC-DC Converter
S Ideal for Point-of-Load Applications
 Up to 1.5A Output Current
 Adjustable Output Voltage: 0.8V to 3.6V
 2.7V to 5.5V Operating Supply voltage
S High Efficiency at Light Load
 Skip Mode with 36µA Quiescent Current
S Low Electromagnetic Emission
 Programmable SYNC I/O Pin
 Spread Spectrum
S Low Power Mode Saves Energy
 Independent Enable Inputs
S Output Rail Monitoring Helps Prevent System Failure
 Open-Drain Power-Good Output
S Limits Inrush Current During Startup
 Built-In Soft-Start Timer
S Overtemperature and Short-Circuit Protections
S 4mm x 4mm, 16-Pin TQFN and 16-Pin TSSOP
Packages
S -40NC to 125NC Operating Temperature Range
Typical Application Circuit
VPV1
PV1
4.7µF
EN1
V_PV2
PV2
4.7µF
EN2
VPV
10Ω
PV
1µF
V_OUT1
GND
OUTS1
LX1
PGND1
OUTS2
LX2
PGND2
2.2µH
VOUT1
22µF
1.5µH
V_OUT2
22µF
VOUT2
Automotive Postregulation
Industrial/Military
Point-of-Load Applications
20kΩ
MAX16963
PG2
EP
PG1
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part, refer to: www.maximintegrated.com/MAX16963.related
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
20kΩ
19-6487; Rev 4; 4/14