LM26420, LM26420-Q0, LM26420-Q1
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SNVS579J –FEBRUARY 2009–REVISED SEPTEMBER 2015
8.2.1.3 Application Curves
VOUT = 1.2 V
25-100% Load Transient
VOUT = 1.2 V
25-100% Load Transient
Figure 46. Load Transient Response - Y Version
Figure 45. Load Transient Response - X Version
VIN = 5 V
VOUT = 1.8 V @ 1 A
VIN = 5 V
VOUT = 1.8 V @ 1 A
Figure 47. Start-Up (Soft-Start)
Figure 48. Enable - Disable
8.2.2 LM26420X 2.2-MHz, 1.8-V Typical High-Efficiency Application Circuit
Vin
4.5V to
5.5V
C
R
7
C
5
C
4
3
R
5
R
6
VIN
1
VIN
c
VIN
2
PG
PG
EN
SW
FB
1
2
2
2
2
LM26420
EN
1
VOUT2
1.8V/2A
VOUT1
3.3V/2A
L
L
2
1
SW
1
R
1
R
2
FB
1
C
C
2
1
PGND , PGND ,
1
2
AGND, DAP
R
3
R
4
Figure 49. LM26420X (2.2 MHz): VIN = 5 V, VOUT1 = 3.3 V at 2 A and VOUT2 = 1.8 V at 2 A
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