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參數(shù)資料
| 型號： | ZA3020 |
| 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 |
| 文件頁數(shù)： | 2/10頁 |
| 文件大?。?/td> | 134K |
| 代理商： | ZA3020 |
Absolute Maximum Ratings
(
Note 1)
Supply Voltage (V
IN
)
Switch Voltage (V
SW
)
Boost Voltage
Feedback Voltage (V
FB
)
Enable/UVLO Voltage (V
EN
)
Comp Voltage (V
COMP
)
Sync Voltage (V
SYNC
)
Junction Temperature
Lead Temperature
Storage Temperature
Recommended Operating Conditions
(Note 2)
28V Input Voltage (V
IN
)
-1V to V
IN
+1V Operating Temperature
V
SW
+ 6V
–0.3 to 6V
–0.3 to 6V
–0.3 to 6V
–0.3 to 6V
Package Thermal Characteristics
150
°
C Thermal Resistance
JA
(SOIC8)
260
°
C
-65 to +150
°
C
4.75V to 25V
-40 to +125
°
C
105
°
C/W
Electrical Characteristics
(Unless otherwise specified V
IN
=12V, T
A
=25 C)
Parameters
Condition
Min
Typ
Max
Units
Feedback Voltage
4.75V
≤
V
IN
≤
25V
V
COMP
< 2V
V
EN
=0V; V
SW
=0V
1.198
1.222
1.246
V
Upper Switch On Resistance
Lower Switch On Resistance
Upper Switch Leakage
Current Limit
Current Limit Gain.
Output Current to Comp Pin Voltage
Error Amplifier Voltage Gain
Error Amplifier Transconductance
Oscillator Frequency
Short Circuit Frequency
Sync Frequency
Maximum Duty Cycle
Minimum Duty Cycle
Enable Threshold
Enable Pull Up Current
Under Voltage Lockout Threshold High Going
Under Voltage Lockout Threshold Hysteresis
Supply current (quiescent)
Supply current (operating)
Thermal Shutdown
0.18
10
0
2.85
μA
A
10
3.3
2.4
1.95
A/V
I
C
=
±
10 μA
V
FB
= 0V
Sync Drive 0 to 2.7V
V
FB
= 1.0V
V
FB
= 1.5V
I
CC
> 100μA
V
EN
= 0V
V
EN
≤
0.4V
V
EN
≥
2.6V; V
FB
=1.4V
400
770
380
42
90
1.0
1.46
2.495
210
23
1.0
160
V/V
μ
Mho
KHz
KHz
KHz
%
%
V
μA
V
mV
μA
mA
C
500
342
30
445
0.7
1.15
2.37
1100
418
54
600
0
1.3
1.8
2.62
36
1.2
Note 1.
Exceeding these ratings may damage the device.
Note 2.
The device is not guaranteed to function outside its operating rating.
Note 3.
Measured on approximately 1” square of 1 oz. copper surrounding device leads.
ZA3020
2A Step-Down, PWM, Switch-Mode
DC-DC Regulators
ZA3020 Rev. 3.
5
2003-04-
22
www.vimicro.com
2
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