LTC3625-1_15 Datasheet, PDF (2/16 Pages) Linear Technology – 1A High Efficiency 2-Cell Supercapacitor Charger with Automatic Cell Balancing

LTC3625/LTC3625-1
Absolute Maximum Ratings
(Note 1)
V_IN, V_OUT (Transient) t < 1ms,
Duty Cycle < 1%........................................... –0.3V to 7V
V_IN, V_OUT, V_MID, PGOOD,
CTL, PROG, PFI, PFO.................................... –0.3V to 6V
EN, V_SEL........................................... –0.3V to V_IN + 0.3V
V_OUT Short-Circuit Duration............................. Indefinite
I_PGOOD, I_PFO............................................................50mA
I_PROG........................................................................1mA
I_VIN, I_SW1, I_SW2, I_VOUT (Note 2)....................................3A
Operating Junction Temperature Range
(Notes 3, 4)............................................ –40°C to 125°C
Storage Temperature Range................... –65°C to 125°C
Pin Configuration
TOP VIEW
SW1 1
V_IN 2
CTL 3
V_SEL 4
EN 5
PROG 6
12 SW2
11 V_OUT
13
10 V_MID
GND
9 PGOOD
8 PFO
7 PFI
DE PACKAGE
12-LEAD (4mm s 3mm) PLASTIC DFN
T_JMAX = 125°C, θ_JA = 43°C/W
EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3625EDE#PBF
LTC3625EDE#TRPBF
3625
12-Lead (4mm × 3mm) Plastic DFN
–40°C to 125°C
LTC3625EDE-1#PBF
LTC3625IDE#PBF
LTC3625IDE-1#PBF
LTC3625EDE-1#TRPBF
LTC3625IDE#TRPBF
LTC3625IDE-1#TRPBF
36251
3625
36251
12-Lead (4mm × 3mm) Plastic DFN
12-Lead (4mm × 3mm) Plastic DFN
12-Lead (4mm × 3mm) Plastic DFN
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
Electrical Characteristics The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T_A = 25°C. V_IN = 3.6V, R_PROG = 143k, unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
V_IN
V_IN(UVLO)
Input Voltage Range
Input Undervoltage Lockout
(V_IN Rising)
Input UVLO Hysteresis
V_SEL = V_IN (LTC3625)
V_SEL = 0V (LTC3625)
V_SEL = 0V or V_IN (LTC3625-1)
l V_IN(UVLO)
l 2.8
2.9
l 2.53
2.63
l 2.53
2.63
100
5.5
V
3.0
V
2.73
V
2.73
V
mV
V_OUT(SLEEP)
V_TOP , V_BOT
Charger Termination Voltage
Recharge Hysteresis
Maximum Voltage Across Either of
the Supercapacitors After Charging
Maximum Supercapacitor Offset
After Charging
V_SEL = V_IN (LTC3625)
V_SEL = 0V (LTC3625)
V_SEL = V_IN (LTC3625-1)
V_SEL = 0V (LTC3625-1)
Below V_OUT(SLEEP)
V_SEL = V_IN, V_OUT = 5.3V (LTC3625)
V_SEL = 0V, V_OUT = 4.8V (LTC3625)
V_SEL = V_IN, V_OUT = 4.5V (LTC3625-1)
V_SEL = 0V, V_OUT = 4V (LTC3625-1)
CTL = 0V
CTL = V_IN
l 5.2
l 4.7
l 4.4
l 3.9
l
l
l
l
5.3
5.4
V
4.8
4.9
V
4.5
4.6
V
4.0
4.1
V
135
mV
2.7
2.75
V
2.45
2.5
V
2.3
2.35
V
2.05
2.1
V
100
180
mV
50
120
mV
3625f