Datasheet

LT3959
20
3959fa
For more information www.linear.com/LT3959
Typical applicaTions
2.5V to 5V Input, –5V Output Inverting Converter
Efficiency vs Output Current
GND
LT3959
V
IN
V
IN
2.5V TO 5V
C
IN
47µF
10V
X5R
C
DC
4.7µF, 25V
X7R
1µF
16V
X5R
DRIVE
FBX
INTV
CC
SSRT
EN/UVLO
SYNC
PGOOD
SGND
V
C
L1B
L1A
GNDK
SW
22k
9.09k
10nF
0.1µF
27.4k
300kHz
124k
121k
C
VCC
4.7µF
10V
X5R
V
OUT
–5V
1A
3959 TA02
D2 D1
84.5k
15.8k
L1A, L1B: COILTRONICS DRQ127-3R3
D1: VISHAY 6CWQ03FN
D2: PHILIPS PMEG2005EJ
C
OUT
47µF
10V
X5R
×2
OUTPUT CURRENT (mA)
0
EFFICIENCY (%)
100
600
3759 TA02a
200 400 1000800
70
60
80
90
50
V
IN
= 5V