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參數(shù)資料
| 型號(hào)： | ZA3020DS |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 2A STEP DOWN PWM SWITCH MODE DC DC REGULATORS |
| 中文描述： | 第2A降壓PWM開關(guān)模式DC DC穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 1/10頁(yè) |
| 文件大小： | 134K |
| 代理商： | ZA3020DS |
General Description
The
ZA3020
is a monolithic step down switch
mode converter with a built in internal Power
MOSFET. It achieves 2A continuous output
current over a wide input supply range with
excellent load and line regulation.
Current mode operation provides fast transient
response and eases loop stabilization.
Fault condition protection includes cycle-by-
cycle current limiting and thermal shutdown. In
shutdown mode the regulator draws 23μA of
supply current.
The
ZA3020
requires a minimum number of
readily
available
components. A synchronization pin allows the
part to be driven to 600KHz.
standard
external
Ordering Information
Part Number
Package Temperature
ZA3020D
S
SOIC8
. For Tape & Reel use suffix - Z (e.g. ZA3020DS-Z)
-40 to +125
°
C
Features
2A Output Current
0.18
Internal Power MOSFET Switch
Stable with Low ESR Output Ceramic
capacitors
Up to 95% Efficiency
20μA Shutdown Mode
Fixed 380kHz frequency
Thermal Shutdown
Cycle-by-cycle over current protection
Wide 4.75 to 25V operating input range
Output Adjustable from 1.22 to 21V
Programmable under voltage lockout
Frequency Synchronization Input
Available in 8 pin SO package
Evaluation Board Available
Applications
Distributed Power Systems
Battery Charger
Pre-Regulator for Linear Regulators
Figure 1: Typical Application Circuit
70
75
80
85
90
95
0
0.5
1
1.5
2
Output Current (A)
E
5.0V
3.3V
2.5V
SHUTDOWN
IN
BS
FB
COMP
GND
EN
SNYC
V
IN
4.75 to 25V
IN
ENABLE
OPEN
NOT USED
V
2.5V/2A
ZA3020
Efficiency versus Output
Current and Voltage. V
IN
=10V
SW
ZA3020
2A Step-Down, PWM, Switch-Mode
DC-DC Regulators
ZA3020 Rev. 3.
5
2003-04-
22
www.vimicro.com 1
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