NX2710
SINGLE CHANNEL PWM CONTROLLER WITH NMOS LDO
CONTROLLER AND 5V BIAS REGULATOR
ADVANCE DATA SHEET
Pb Free Product
FEATURES
DESCRIPTION
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Bus voltage operation from 9V to 24V
5V bias regulator available
The NX2710 controller IC is a compact synchronous
Buck controller IC with 16 lead SOIC package designed
for step down DC to DC converter applications with
feedforward functionality. Voltage feedforward provides
fast response, good line regulation and nearly constant
power stage gain under wide voltage input range. The
NX2710 controller is optimized to convert single sup-
ply up to 24V bus voltage to as low as 0.8V output
voltage. Internal UVLO keeps the regulator off until the
supply voltage exceeds 9V where internal digital soft
starts get initiated to ramp up output. The NX2710 em-
ploys programmable current limiting and FB UVLO
followed by HICCUP feature. Other features include:
5V gate drive, Programmable frequency from 300kHz
to 1MHz, Adaptive deadband control, Internal digital
soft start; Vcc under voltage lockout and shutdown ca-
pability via comp pin.
Excellent dynamic response with input voltage
feed-forward and voltage mode control
Programmable switching frequency up to 1MHz
Internal Digital Soft Start Function
Programmable hiccup current limit
Shutdown by pulling COMP pin low
NMOS LDO controller available
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Start into precharged output
Pb-free and RoHS compAlianPt PLICATIONS
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Notebook PC
Graphic Card on board converters
On board DC to DC such as
12V to 3.3V, 2.5V or 1.8V
Set Top Box and LCD Display
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TYPICAL APPLICATION
DO3316P-102
VIN1
+12V
MBR0530T1
1
2*16SVP330M
8
VIN
BST
1uF
0.1uF
1ohm
2
Q1
HDRV
0.75uH
VOUT1
16
12
9
SW
REGCS
+1.2V@25A
8.06k
OCP
3.3nF
1.2k
2*(560uF,7mohm)
4
3
7.5k
LDRV
GND
Q2
10
13
REGOUT
VCC
+5V
14
15
Fb
10uF
1uF
2.5k
15nF
Comp
15k
5k
680pF
VIN2
+3.3V
11
5
REGFB
RT
1.65k
6
7
MTD3055
LDO OUT
LDO FB
0
82pF
5k
VOUT2
+1.6V@2A
5k
150uF
18mohm
Figure1 - Typical application of NX2710
ORDERING INFORMATION
Device
NX2710CSTR
Temperature
0 to 70o C
Package
SOIC -16L
Frequency
300kHz to 1MHz
Pb-Free
Yes
Rev. 1.3
08/07/07
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