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參數(shù)資料
| 型號： | AMS4122S |
| 廠商： | Advanced Monolithic Systems, Inc. |
| 英文描述： | SINGLE 4A/DUAL 2A BUCK CONVERTER IN SO8 |
| 中文描述： | 單4A/DUAL甲BUCK變換器采用SO8 |
| 文件頁數(shù)： | 3/6頁 |
| 文件大?。?/td> | 542K |
| 代理商： | AMS4122S |
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723
AMS4122
ABSOLUTE MAXIMUM RATINGS
V
IN
F/B
EN
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at T
A
= 25
°
C and VIN=12V (unless otherwise noted).
PARAMETER
4.0V to 20V
-0.3 to +12.0V
-0.3V to +20V
Junction Temperature
Storage Temperature
Lead temperature
+150oC
-65oC to +150oC
260oC
TEST CONDITIONS
AMS4122
Min. Typ. Max.
Units
Feedback voltage
F/B-1 and F/B-2
0.590
0.6
0.610
V
Full Load Output Current
Feedback2 (note 1)
Phase Shift between Outputs
Measured on each channel (note 4)
Two Phase Mode
Dual Output Mode
2
2.5
2.5
189
A
V
<o
A
1.3
180
4
171
Current Limit
Phase current match Dual Phase Single Output Mode
Oscillator Frequency
Maximum Duty Cycle
Enable Threshold
Enable Hysteresis
Enable Pull-up Current
Under Voltage Lockout
Threshold Rising
Under Voltage Lockout
Threshold Hysteresis
Supply Current (Shutdown)
Supply Current (Quiescent)
Thermal Shutdown
Total Power dissipation
Notes:
1) When a 1.3V or greater is applied to F/B2, the device enters in Two Phase Mode of operation.
2) The oscillators for each switching regulator are shifted by 180o of each-other to accommodate dual phase operation and reduce the ripples in the input
power supply.
3) The power dissipation for SO-8 EDP package is limited to 2.5W rated at 25
°
C ambient temperatures. The thermal resistance Junction to Case is
45
°
C/W. Total power dissipation for both switching regulators should be taken in consideration when calculating the output current for each regulator.
4) The load current is specified for two output configuration. In two phase single output the maximum load current is double.
Per Output
10
400
2.5
120
0.7
3.5
150
100
1.5
135
2.5
%
KHz
%
V
mV
μ
A
V
mV
nA
mA
°
C
W
Note(2)
360
440
100
V
EN
≤
0.4V
V
EN
≥
2.8V; V
FB
= 1.5V
Note (3)
1.9
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| AMS421 | 制造商:ADMOS 制造商全稱:ADMOS 功能描述:0.5V SHUNT REGULATOR |
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