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| XRP6142EL2-0-F Datasheet, PDF (7/17 Pages) Exar Corporation – Synchronous Step-Down Controller with DDR Memory Termination | |||
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XRP6142
Synchronous Step-Down Controller with DDR
Memory Termination
500
XRP6142EL2.0-F
450
400
350
VC C =5V
IOUT=15A
300
3.5
4.0
4.5
5.0
5.5
VIN (V)
Fig. 10: Frequency versus VIN
25
XRP6142EL2.0-F
20
15
10
tested Iocp
5
calculated Iocp
0
0.8
1.2
1.6
2.0
RLIM (kΩ)
Fig. 11: IOCP versus RLIM
VIN
5V/DIV
2ms/DIV
VOUT
2V/DIV
VSW
5V/DIV
IOUT
2V/DIV
XRP6142EL2.0-F
Fig. 12: Power-up into a 15A load, VIN=5V, VOUT=2.5V
VIN
5V/DIV
2ms/DIV
XRP6142EL2.0-F
VOUT
2V/DIV
VSW
5V/DIV
IOUT
2V/DIV
Fig. 13: Power-down from a 15A load, VIN=5V, VOUT=2.5V
VSW
5V/DIV
2μs/DIV
VOUT
20mV/DIV
AC coupled
100μs/DIV
VOUT
100mV/DIV
AC coupled
XRP6142EL2.0-F
IL
10A/DIV
XRP6142EL2.0-F
Fig. 14: Steady state, output ripple is 30mV p-p, VOUT=2.5V
IOUT
10A/DIV
Fig. 15: Transient response, 250mV p-p, 15A load step
© 2010 Exar Corporation
Page 7 of 17
Rev. 1.0.0
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