MAX8792ETD+T Maxim Integrated Products, MAX8792ETD+T Datasheet
MAX8792ETD+T
Manufacturer Part Number
MAX8792ETD+T
Description
IC PWM CONTROLLER 14TDFN
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX8792ETDT.pdf
(29 pages)
Specifications of MAX8792ETD+T
Applications
PWM Controller
Voltage - Input
2 ~ 26 V
Current - Supply
700µA
Operating Temperature
-40°C ~ 80°C
Mounting Type
Surface Mount
Package / Case
14-TDFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Supply
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
The MAX8792 pulse-width modulation (PWM) controller
provides high efficiency, excellent transient response,
and high DC-output accuracy needed for stepping
down high-voltage batteries to generate low-voltage
core or chipset/RAM bias supplies in notebook comput-
ers. The output voltage can be dynamically controlled
using the dynamic REFIN, which supports input volt-
ages between 0 to 2V. The REFIN adjustability com-
bined with a resistive voltage-divider on the feedback
input allows the MAX8792 to be configured for any out-
put voltage between 0 to 0.9 V
Maxim’s proprietary Quick-PWM™ quick-response, con-
stant-on-time PWM control scheme handles wide
input/output voltage ratios (low-duty-cycle applications)
with ease and provides 100ns “instant-on” response to
load transients while maintaining a relatively constant
switching frequency. Strong drivers allow the MAX8792
to efficiently drive large synchronous-rectifier MOSFETs.
The controller senses the current across the synchro-
nous rectifier to achieve a low-cost and highly efficient
valley current-limit protection. The adjustable current-
limit threshold provides a high degree of flexibility,
allowing thermally compensated protection using an
NTC or foldback current-limit protection using a volt-
age-divider derived from the output.
The MAX8792 includes a voltage-controlled soft-start
and soft-shutdown in order to limit the input surge cur-
rent, provide a monotonic power-up (even into a
precharged output), and provide a predictable power-
up time. The controller also includes output fault protec-
tion—undervoltage and overvoltage protection—as well
as thermal-fault protection.
The MAX8792 is available in a tiny 14-pin, 3mm x 3mm
TDFN package. For space-constrained applications,
refer to the MAX17016 single step-down with 10A, 26V
internal MOSFETs available in a small 40-pin, 6mm x
6mm TQFN package.
.
19-0739; Rev 0; 1/07
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Notebook Computers
I/O and Chipset Supplies
GPU Core Supply
DDR Memory—VDDQ or VTT
Point-of-Load Applications
Step-Down Power Supply
________________________________________________________________ Maxim Integrated Products
General Description
IN
.
Applications
Controller with Dynamic REFIN
Single Quick-PWM Step-Down
o Quick-PWM with Fast Transient Response
o Supports Any Output Capacitor
o Precision 2V ±10mV Reference
o Dynamically Adjustable Output Voltage
o 26V Maximum Input Voltage Rating
o Adjustable Valley Current-Limit Protection
o Resistively Programmable Switching Frequency
o Overvoltage Protection
o Undervoltage/Thermal Protection
o Voltage Soft-Start and Soft-Shutdown
o Monotonic Power-Up with Precharged Output
o Power-Good Window Comparator
Note: This device is specified over the -40°C to +80°C operating
temperature range.
+ Denotes a lead-free package.
MAX8792ETD+T 14 TD FN - E P * 3m m x 3m m
(0 to 0.9 V
TOP VIEW
PART
No Compensation Required with
Stable with Ceramic Output Capacitors Using
Feedback Input Regulates to 0 to 2V REFIN
0.5% V
Thermal Compensation with NTC
Supports Foldback Current Limit
Polymers/Tantalum
External Compensation
Voltage
OUT
IN
Range)
PIN-PACKAGE
Accuracy Over Line and Load
14
1
13
2
Ordering Information
(3mm x 3mm)
12
3
MAX8792
TDFN
Pin Configuration
11
4
10
5
GND
9
6
8
7
T1433-1
CODE
Features
PKG
MARK
TOP
ADC
1
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