NX7102 Datasheet, PDF (1/12 Pages) Microsemi Corporation – 3A High Voltage Synchroous Buck Converter

NX7102
TM
® _{3A High Voltage Synchroous Buck Converter}
PRODUCTION DATA SHEET
DESCRIPTION
NX7102 is a 340kHz fixed The controller is equipped with
frequency, current mode, PWM output over-voltage protection which
synchronous buck (step-down) DC- protects the IC under a open load
DC converter, capable of driving a 3A condition. Additional safety features
load with high efficiency, excellent include under voltage lock-out
line and load regulation. The device (UVLO), programmable soft-start and
integrates N-channel power MOSFET over-temperature protection (OTP) to
switches with low on-resistance. protect the circuit.
Current mode control provides fast This IC is available in SOIC-8 with
transient response and cycle-by-cycle exposed pad package.
current limit.
KEY FEATURES
ƒ 3A Synchronous Step-down
Regulator
ƒ Operational Input Supply
Voltage Range: 4.75V-18V
ƒ Integrated Upper NMOS and
Lower NMOS
ƒ 340kHz Switching Frequency
ƒ Input UVLO
ƒ Enable
ƒ Programmable External Soft-
Start
ƒ Cycle-By-Cycle Over-Current
Protection
ƒ Over Voltage Protection
ƒ Frequency Fold Back Under
Short Condition
APPLICATIONS
ƒ Set-Top Box
ƒ LCD TV’s
ƒ Notebook/Netbook
ƒ PoE Powered Devices
12V
VIN
Copyright © 2010
Rev.1.3, 2011-04-22
PRODUCT HIGHLIGHT
IN(2)
BST(1)
CIN
NX7102 ^{2x10uF(25V,X5R)}
C4 0.1u
SS(8)
SW(3)
R4 100k
R5 20k
EN(7)
FB(5)
GND(4) PAD COMP(6)
R3
10k
C3
5.6nF
C5
10nF
L1
10uH
R1
26.1k
R2
10k
Figure 1 – 12V Input, 3.3V Output with Ceramic Cap
3.3V
OUT
COUT
2*22uF(10V,X5R)
PACKAGE ORDER INFO
Plastic SOIC 8 Pin
T_A (°C) ^DE With Exposed Pad
RoHS Compliant / Pb-free
-40 to 85
NX7102IDE
Note: Available in Tape & Reel. Append the letters “TR” to the part
number. (i.e. NX7102IDE-TR)
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
Page 1