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ZXM64NO3X Datasheet

  • ZXM64NO3X

  • HIGH EFFICIENCY SIMPLESYNC PWM DC-DC CONTROLLERS

  • 28頁

  • ZETEX

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ZXRD1000 SERIES
HIGH EFFICIENCY SIMPLESYNC餂?PWM DC-DC CONTROLLERS
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DESCRIPTION
The ZXRD1000 series provides complete control and
protection functions for a high efficiency (> 95%) DC-DC
converter solution. The choice of external MOSFETs allow
the designer to size devices according to application. The
ZXRD1000 series uses advanced DC-DC converter
techniques to provide synchronous drive capability, using
innovative circuits that allow easy and cost effective
implementation of shoot through protection. The
FEATURES
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> 95% Efficiency
Fixed frequency (adjustable) PWM
Voltage mode to ensure excellent stability &
transient response
Low quiescent current in shutdown mode,15碌A(chǔ)
Low battery flag
Output down to 2.0V
Overload protection
Demonstration boards available
Synchronous or non-synchronous operation
Cost effective solution
N or P channel MOSFETs
QSOP16 package
ZXRD1000 series can be used with an all N channel
topology or a combination N & P channel topology.
Additional functionality includes shutdown control, a
user adjustable low battery flag and simple
adjustment of the fixed PWM switching frequency.
The controller is available with fixed outputs of 5V or
3.3V and an adjustable (2.0 to 12V) output.
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Fixed 3.3, 5V and adjustable outputs
Programmable soft start
APPLICATIONS
High efficiency 5 to 3.3V converters up to 4A
Sub-notebook computers
Embedded processor power supply
Distributed power supply
Portable instruments
Local on card conversion
GPS systems
Very high efficiency SimpleSync
TM
converter.
V
CC
4.5-10V
D2
BAT54
R1
100k
Shut Down
9
IC1
13
V
IN
V
DRIVE
Bootstrap
2
1
ZXM64N02X
C10
1碌F
C11
1碌F
C6
1碌F
N1
L1
15碌H
R
SENSE
V
OUT
3.3V 4A
SHDN
LB
SET
C5
1碌F
Low input flag
0.01R
R6
10k
Cx2
0.01碌F
C
OUT
11 LBF
14
10
6
5
Delay
Decoup
V
INT
C
T
G
ND
R
SENSE+
7
R
SENSE -
8
V
FB
16
Comp
15
PWR
G
ND
3
C9
1碌F
RX
R2 CX1
2k7
680R 0.022碌F
R4
10k
D3
BAT54
Fx
D1
C8
2.2碌F
ZHCS1000
R5
6k
x2
680碌F
120碌F
C
IN
68碌F
C1
1碌F
C2
330pF
1碌F
C4
4
1碌F C3
C7
22碌F
N2
ZXM64N02X
R3
3k
ISSUE 4 - OCTOBER 2000
1

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