ZA3020 Datasheet, PDF (2/10 Pages) List of Unclassifed Manufacturers – 2A STEP DOWN PWM SWITCH MODE DC DC REGULATORS

ZA3020
2A Step-Down, PWM, Switch-Mode
DC-DC Regulators
Absolute Maximum Ratings (Note 1)
Supply Voltage (V_IN)
Switch Voltage (V_SW)
28V
-1V to V_IN +1V
Boost Voltage
V_SW + 6V
Feedback Voltage (V_FB)
Enable/UVLO Voltage (V_EN)
Comp Voltage (V_COMP)
–0.3 to 6V
–0.3 to 6V
–0.3 to 6V
Sync Voltage (V_SYNC)
–0.3 to 6V
Junction Temperature
150°C
Lead Temperature
260°C
Storage Temperature
-65 to +150°C
Recommended Operating Conditions (Note 2)
Input Voltage (V_IN)
4.75V to 25V
Operating Temperature
-40 to +125°C
Package Thermal Characteristics
Thermal Resistance ș_JA (SOIC8)
105°C/W
Electrical Characteristics (Unless otherwise specified V_IN=12V, T_A=25 C)
Parameters
Condition
Min Typ
Feedback Voltage
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
4.75V ≤ V_IN ≤ 25V
V_COMP < 2V
V_EN=0V; V_SW=0V
∆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
1.198
2.4
500
342
30
445
1.222
0.18
10
0
2.85
1.95
400
770
380
42
90
0.7
1.0
1.15 1.46
2.37 2.495
210
23
1.0
160
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.
Max
1.246
10
3.3
1100
418
54
600
0
1.3
1.8
2.62
36
1.2
Units
V
ȍ
ȍ
µA
A
A/V
V/V
µMho
KHz
KHz
KHz
%
%
V
µA
V
mV
µA
mA
C
ZA3020 Rev. 3.5 2003-04-22
www.vimicro.com
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