AMS4122 View Datasheet(PDF) - Advanced Monolithic Systems Inc
Part Name
Description
MFG CO.
'AMS4122' PDF : 6 Pages View PDF
ABSOLUTE MAXIMUM RATINGS
VIN
F/B
EN
4.0V to 20V
-0.3 to +12.0V
-0.3V to +20V
Junction Temperature
Storage Temperature
Lead temperature
AMS4122
+150ºC
-65ºC to +150ºC
260ºC
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at TA= 25 °C and VIN=12V (unless otherwise noted).
PARAMETER
TEST CONDITIONS
Feedback voltage
Full Load Output Current
Feedback2 (note 1)
Phase Shift between Outputs
Current Limit
Phase current match
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
F/B-1 and F/B-2
Measured on each channel (note 4)
Two Phase Mode
Dual Output Mode
Per Output
Dual Phase Single Output Mode
Note(2)
VEN ≤ 0.4V
VEN ≥ 2.8V; VFB = 1.5V
Note (3)
AMS4122
Min. Typ. Max.
0.590
0.6
0.610
2
2.5
1.3
2.5
171
180
189
4
10
360
400
440
100
2.5
120
0.7
3.5
150
100
1.5
1.9
135
2.5
Units
V
A
V
<º
A
%
KHz
%
V
mV
µA
V
mV
nA
mA
°C
W
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.
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723
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