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| ER2120QI Datasheet, PDF (7/24 Pages) Altera Corporation – 2A Synchronous Buck Regulator with Integrated MOSFETs | |||
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Page 7
Electrical Specifications Refer to âBlock Diagramâ and âTypical Application Schematicsâ. Operating conditions unless otherwise
noted: VIN = 12V, or VAVIN = 5V ±10%, TA = -40°C to +85°C. Typical are at TA = +25°C. Boldface limits apply over the operating temperature
range,
-40°C to +85°C
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
MAX UNIT
(Note 3) TYP (Note 3) S
NOTES:
3. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by
characterization and are not production tested.
4. Minimum VIN can operate below 5.5V as long as VAVIN is greater than 4.5V.
5. Maximum VIN can be higher than 14V voltage stress across the upper and lower do not exceed 15.5V in all conditions.
6. Circuit requires 150ns minimum on time to detect overcurrent condition.
7. Limits established by characterization and are not production tested.
8. POK Rising Delay is measured from the point where VOUT reaches regulation to the point where POK rises. It does not include the external
soft-start time. The POK Rising Delay specification is measured at 500kHz.
Typical Performance Curves VIN = 12V, VOUT = 2.5V, IO = 2A, fSW = 500kHz, L = 4.7µH, CIN = 20µF,
COUT = 100µF + 22µF, TA = +25° C, unless otherwise noted.
100
100
90
90
80
70
VOUT = 1.8V
VOUT = 2.5V
VOUT = 3.3V
60
50
80
70
VOUT = 5.0V
VOUT = 3.3V
VOUT = 2.5V
60
VOUT = 1.8V
50
400.0
0.5
1.0
1.5
2.0
2.5
OUTPUT LOAD (A)
FIGURE 5. EFFICIENCY vs LOAD (VIN = 5V)
40
0.0
0.5
1.0
1.5
2.0
2.5
OUTPUT LOAD (A)
FIGURE 6. EFFICIENCY vs LOAD (VIN = 12V)
0.6026
0.6025
0.6024
0.6023
0.6022
14VIN
0.6021
9VIN
0.6020
5VIN
0.6019 0
1
2
OUTPUT LOAD (A)
FIGURE 7. VOUT REGULATION vs LOAD (VOUT = 0.6V, 500kHz)
1.206
1.205
14VIN
1.204
1.203
9VIN
1.202
1.201
5VIN
1.200 0
1
2
OUTPUT LOAD (A)
FIGURE 8. VOUT REGULATION vs LOAD (VOUT = 1.2V, 500kHz)
March 2014 Altera Corporation
09615
ER2120QI 2A Synchronous Buck Regulator with Integrated MOSFETs
March 14, 2014
Rev A
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