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| ER2120QI Datasheet, PDF (12/24 Pages) Altera Corporation – 2A Synchronous Buck Regulator with Integrated MOSFETs | |||
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Page 12
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. (Continued)
EN1
5V/DIV
VOUT1
1V/DIV
IL1
2A/DIV
SS1
2V/DIV
FIGURE 27. SOFT-START AT NO LOAD
EN1
5V/DIV
VOUT1
1V/DIV
IL1
1A/DIV
SS1
2V/DIV
FIGURE 29. SOFT-START AT FULL LOAD
EN1
5V/DIV
2V PRE-BIASED
IL1
1A/DIV
VOUT1
0.5V/DIV
SS1
2V/DIV
FIGURE 28. START-UP WITH PRE-BIASED
SW1
10V/DIV
VOUT1
1V/DIV
IL1
1A/DIV
POK1
5V/DIV
FIGURE 30. POSITIVE OUTPUT SHORT CIRCUIT
ER2120QI 2A Synchronous Buck Regulator with Integrated MOSFETs
09615
March 14, 2014
March 2014 Altera Corporation
Rev A
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