LTC4080EMSE View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
LTC4080EMSE Datasheet PDF : 20 Pages
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LTC4080
TYPICAL APPLICATIO
Li-Ion Battery Charger with 1.5V Buck Regulator
VCC
(3.75V
to 5.5V)
R3
510Ω
R4, 510Ω
D2
CIN
4.7μF
VCC
BAT
ACPR
CHRG
LTC4080
EN_CHRG
SW
EN_BUCK
FB
MODE GND PROG
*COILCRAFT LPO1704-103M
D1
500mA
L1, 1OμH*
CPL
10pF
R1
715k
RPROG
806Ω
R2
806k
4080 TA02
CBAT +
4.7μF
4.2V
Li-Ion
BATTERY
VOUT
(1.5V/300mA)
COUT
4.7μF
Buck Efficiency vs Load Current
(VOUT = 1.5V)
100
1000
EFFICIENCY
80 (Burst)
EFFICIENCY
(PWM)
60
100
POWER
LOSS 10
(PWM)
40
20
0
0.01
POWER LOSS
0
(Burst)
VBAT = 3.8V
VOUT = 1.5V
0.1
L = 10μH
C = 4.7μF
0.01
0.1
1
10
100 1000
LOAD CURRENT (mA)
4080 G13
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PART NUMBER DESCRIPTION
COMMENTS
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Low Loss PowerPathTM Controller in ThinSOT
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Automatic Switching Between DC Sources, Load Sharing, Replaces ORing Diodes
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Dual Ideal Diode in DFN
2-Channel Ideal Diode ORing, Low Forward On-Resistance, Low Regulated
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ThinSOT and PowerPath are trademarks of Linear Technology Corporation.
4080fb
20 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
LT 0807 REV B • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2006
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