LTC4040_15 Datasheet, PDF (26/26 Pages) Linear Technology – 2.5A Battery Backup Power Manager

LTC4040
Typical Application
5V Backup Application with OVP Protection and Non-Backed Up Load Option
(Charge Current Setting: 2.5A, Input Current Limit Setting: 4A)
4.35V TO 5V
INPUT SUPPLY
(PROTECTED
TO 40V)
V_PWR
R_S
MN1
6mΩ
6.2k 1/4W
OVP OPT
178k
2.2µF
MN2
60.4k
V_IN CLN
OVSNS
PFI
IGATE
V_SYS
BSTFB
RSTFB
FAULT
PFO
RST
CHRG
CLPROG
LTC4040
CHGOFF BSTOFF GND F0 F1 F2
SW
BAT
NTC
PROG
V_SYS
800Ω
L1: COILCRAFT XAL-5030-222
MN1: VISHAY/SILICONIX SiS488DN
MN2: VISHAY/SILICONIX SIR424DP-T1-GE3
V_SYS
4.35V TO 5V
1690k
TO NON-BACKED-UP
LOAD
TO BACKED-UP
SYSTEM LOAD
100µF
324k
2.2µH
V_IN
R_BIAS
10µF
+
NTC
Li-Ion
BATTERY
4.1V
4040 TA03
Related Parts
PART NUMBER
LTC3226
LTC3350
LTC3355
LTC4089
LTC4090
LTC4110
LTC4155/LTC4156
LTC4160
DESCRIPTION
COMMENTS
2-Cell Supercapacitor Charger with Backup PowerPath™ 1x/2x Multimode Charge Pump Supercapacitor Charger, Internal 2A LDO
Controller
Backup Supply
High Current Supercapacitor Backup Controller and
System Monitor
High Efficiency Synchronous Step-Down CC-CV Charging of 1-4 Series
Supercapacitors
20V 1A Buck DC/DC with Integrated SCAP Charger and 1A Main Buck Regulator, 5A Boost Backup Regulator
Backup Regulator
USB Power Manager with High Voltage Switching
Charger
1.2A Charger for Li-Ion from 6V to 86V Supply
USB Power Manager with 2A High Voltage Bat-Track
Buck Regulator
2A Charger with Bat-Track for Li-Ion Batteries
Battery Backup System Manager
Complete Manager for Li-Ion/Polymer, Lead Acid, NiMH/NiCd Batteries
and Supercapacitors
Dual Input Power Manager/3.5A Li-Ion Battery Charger
with I²C Control and USB OTG
3.5A Charge Current for Li-Ion/Polymer, LTC4156 for LiFePO₄ Batteries
Switching Power Manager with USB On-The-Go and
Overvoltage Protection
1.2A Charge Current
26 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 950_Fo3_r5_m-7_o4_re1_i7_{nformation www.linear.com/LTC4040}
[phone] ^● FAX: [phone] ^● www.linear.com/LTC4040
4040fa
LT 0715 REV A • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2015