MAX5077 Maxim Integrated Products, MAX5077 Datasheet
MAX5077
Manufacturer Part Number
MAX5077
Description
Push-Pull FET Driver
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX5077.pdf
(9 pages)
www.DataSheet4U.com
The MAX5077 is a +4.5V to +15V push-pull, current-fed
topology driver subsystem with an integrated oscillator
used in telecom module power supplies. The device
drives two MOSFETs connected to a center-tapped
transformer primary providing secondary-side, isolated,
negative or positive voltages. The MAX5077 features a
programmable accurate integrated oscillator with a
synchronizing clock output to synchronize an external
PWM regulator. A single external resistor programs the
internal oscillator frequency from 50kHz to 1.5MHz.
The MAX5077 incorporates dual MOSFET drivers with
±3A peak drive currents and 50% duty cycle. The
MOSFET drivers generate complementary signals to
drive external ground-referenced n-channel MOSFETs.
The MAX5077 clock output frequency is programmable
by logic inputs to set the clock output to 1x, 2x, or 4x
the MOSFET’s driver frequency.
The MAX5077 is available in a 14-pin exposed pad
TSSOP package and is specified over the -40°C to
+125°C operating temperature range.
19-3663; Rev 0; 5/05
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.
Push-Pull FET Driver with Integrated Oscillator
Current-Fed Power Supplies
Power-Supply Building Subsystems
Push-Pull Driver Subsystems
GND
V
IN
CONTROLLER
GND
PWM
V
IN
SYNCIN
________________________________________________________________ Maxim Integrated Products
DRVH
DRVL
General Description
Applications
and Programmable Clock Output
V
CC
V
I.C.
AGND
CLK
SEL1
RT
CC
MAX5077
DGND
NDRV2
NDRV1
PGND
o Dedicated Current-Fed, Push-Pull Driver
o Oscillator Frequency Programmable from 50kHz
o Single +4.5V to +15V Supply Voltage Range
o ±3A Peak Gate-Drive Current
o 1mA Operating Current at 250kHz with No
o Selectable Synchronizing Clock Frequency for a
o Thermally Enhanced 14-Pin TSSOP
o -40°C to +125°C Operating Temperature Range
*EP = Exposed paddle.
Pin Configuration appears at end of data sheet.
SEL2
MAX5077AUD
Subsystem
to 1.5MHz
Capacitive Load
Preceding PWM Stage
PART
Typical Operating Circuit
-40°C to +125°C 14 TSSOP-EP*
TEMP RANGE
Ordering Information
PIN-PACKAGE
Features
U14E-3
CODE
PKG
V
OUT
1
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