LTC3529 Linear Dimensions Semiconductor, LTC3529 Datasheet - Page 10

• Manufacturer Part Number: LTC3529
• Description: 1.5MHz Step-Up dc
• Manufacturer: Linear Dimensions Semiconductor

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LTC3529
TYPICAL APPLICATIONS
10
1.8V
3.2V
TO
+
CURRENT
1A/DIV
2-CELL
ALKALINE
5V/DIV
2V/DIV
FAULT
LOAD
V
OUT
AUTO-RESTART
*L1: SUMIDA CDRH5D16NP
2 Alkaline Cells to 5V at 350mA
C
3.3μF
IN
Overcurrent Event
OFF
OFF
Li-Ion Battery to 5V at 100mA or 500mA for USB OTG Host Supply
V
ON
ON
270Ω
2.5V
4.2V
20ms/DIV
RST
TO
AUTO-RESTART
+
High
V
FAULT SNSGND
RST
SHDN
IN
*L1: SUMIDA CDRH5D16NP
Li-Ion
LTC3529
4.7μH
L1*
TO μP
PGND
3529 TA03a
V
OUT
OFF
OFF
SW
1M
3.3μF
3529 TA02b
1.8V
ON
ON
6.8μF
C
OUT
V
FAULT SNSGND
RST
SHDN
IN
LTC3529
4.7μH
V
L1*
OUT
CURRENT
PGND
3529 TA02a
, 5V
V
OUT
5V/DIV
1A/DIV
2V/DIV
SW
FAULT
LOAD
V
OUT
6.8μF
C
OUT
100
90
80
70
60
50
40
30
20
10
V
0
OUT
Overcurrent Event
1
C
INDUCTOR = 4.7μH,
COOPER BUSSMANN SD25-4R7
OUT
, 5V
2 Alkaline Cells to 5V Effi ciency
V
20ms/DIV
= 6.8μF
RST
EFFICIENCY
Low
LOAD CURRENT (mA)
POWER LOSS
10
V
IN
V
V
IN
IN
= 3V
100
= 1.8V
= 1.8V
3529 TA02c
V
IN
= 3V
3529 TA03b
1000
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
3529fa