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LTC3121 Datasheet(PDF) 22 Page - Linear Technology

Part # LTC3121
Description  15V, 1.5A Synchronous Step-Up DC/DC Converter with Output Disconnect
PDF  26 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3121 Datasheet(HTML) 22 Page - Linear Technology

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LTC3121
22
3121fa
For more information www.linear.com/LTC3121
Typical applicaTions
USB/Battery Powered Synchronous Boost Converter, 4.3V to 5V, 500mA
3121 TA06a
VIN
SD
PWM/SYNC
RT
VCC
VOUT
CAP
FB
VC
LTC3121
SGND
PGND
RC
43.2k
CC
1nF
SW
L1
3.3µH
R2
121k
R1
383k
CF
68pF
CVCC
4.7µF
C1
100nF
COUT
47µF
VOUT
5V
500mA
RT
57.6k
VIN
4.3V TO 5.5V
CIN
4.7µF
C2
4.7µF
ON
OFF
CIN, CVCC: 4.7µF, 6.3V, X7R, 1206
C1: 100nF, 6.3V, X7R, 1206
COUT: 47µF, 6.3V, X7R, 1812
C2: LELON VE-4R7M1ATR-0305
L1: TDK SPM6530T-3R3M
2ms/DIV
3121 TA06b
INPUT
CURRENT
0.5A/DIV
VOUT
2V/DIV
VIN
2V/DIV
RLOAD = 20Ω
VIN = USB 2.0
PORT HOTPLUGGED
5V to Dual Output Synchronous Boost Converter, ±15V
OUTPUT CURRENT (mA)
0
–15.1
–15.0
–14.8
–14.6
–14.5
–14.9
–14.7
–14.4
–14.3
–14.2
–14.1
15.1
15.0
14.8
14.6
14.5
14.9
14.7
14.4
14.3
14.2
14.1
140
35
70
3121 TA07b
105
VOUT1
VOUT2
3121 TA07a
VIN
SD
PWM/SYNC
RT
VCC
VOUT
CAP
FB
VC
LTC3121
SGND
PGND
RC
365k
CC
150pF
SW
L1
6.8µH
R2
113k
Z1
R1
1.3M
CF
10pF
CVCC
4.7µF
C1
100nF
U1
C2
470nF
COUT1
22µF
COUT2
47µF
VOUT1
15V
VOUT2
–15V
RT
57.6k
VIN
5V
CIN
4.7µF
ON
OFF
CIN, CVCC: 4.7µF, 6.3V, X7R, 1206
COUT2: 47µF, 16V, X7R, 1206
C1: 100nF, 6.3V, X7R, 1206
COUT1: 22µF, 16V, X7R, 1812
C2: 470nF, 25V, X7R, 1206
L1: COILCRAFT XAL5050-682ME
U1: CENTRAL SEMICONDUCTOR CBAT54S
Z1: DIODES, INC. DDZ16ASF-7



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