LTC3625IDE#PBF Linear Technology, LTC3625IDE#PBF Datasheet

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LTC3625IDE#PBF

Manufacturer Part Number
LTC3625IDE#PBF
Description
IC SUPERCAP CHARGER 1A 12DFN
Manufacturer
Linear Technology
Datasheet

Specifications of LTC3625IDE#PBF

Applications
Supercapacitor Charger
Voltage - Supply
2.7 V ~ 5.5 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Supply
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC3625IDE#PBFLTC3625IDE
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LTC3625IDE#PBF/ED
Manufacturer:
LT
Quantity:
61
Company:
Part Number:
LTC3625IDE#PBFLTC3625IDE-1
Manufacturer:
LT
Quantity:
10 000
FeaTures
n
n
n
n
n
n
n
n
n
applicaTions
n
n
n
n
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
Typical applicaTion
2.7V TO 5.5V
High Efficiency Step-Up/Step-Down Charging of Two
Series Supercapacitors
Automatic Cell Balancing Prevents Capacitor
Overvoltage During Charging
Programmable Charging Current Up to 500mA
(Single Inductor), 1A (Dual Inductor)
V
Selectable 2.4V/2.65V Regulation per Cell (LTC3625)
Selectable 2V/2.25V Regulation per Cell (LTC3625-1)
Low No-Load Quiescent Current: 23µA
I
Low Profile 12-lead 3mm × 4mm DFN Package
Servers, RAID Systems, Mass Storage, High Current
Backup Supplies
Solid State Hard Drives
Wireless Power Meters
High Peak Power Boosted Supplies
VOUT
IN
= 2.7V to 5.5V
V
IN
, I
VIN
< 1µA in Shutdown
61.9k
10µF
1A SCAP Charger
V
PROG
PFI
EN
CTL
V
IN
SEL
LTC3625
PGOOD
V
V
SW2
SW1
PFO
OUT
MID
3625 TA01a
3.3µH
3.3µH
C
C
TOP
BOT
V
4.8V
OUT
≥ 0.1F
≥ 0.1F
DescripTion
The LTC
tor chargers designed to charge two supercapacitors in
series to a fixed output voltage (4.8V/5.3V or 4V/4.5V
selectable) from a 2.7V to 5.5V input supply. Automatic
cell balancing prevents overvoltage damage to either
supercapacitor while maximizing charge rate. No balancing
resistors are required.
High efficiency, high charging current, low quiescent cur-
rent and low minimum external parts count (one inductor,
one bypass capacitor at V
make the LTC3625/LTC3625-1 ideally suited for small form
factor backup or high peak power systems.
Charging current/maximum input current level is pro-
grammed with an external resistor. When the input supply is
removed and/or the EN pin is low, the LTC3625/LTC3625-1
automatically enter a low current state, drawing less than
1µA from the supercapacitors.
The LTC3625/LTC3625-1 are available in a compact
12-lead 3mm × 4mm × 0.75mm DFN package.
Supercapacitor Charger
1A High Efficiency 2-Cell
®
Charging Two 2:1 Mismatched Supercapacitors
3625/LTC3625-1 are programmable supercapaci-
6
5
4
3
2
1
0
0
C
C
R
CTL = 0
V
with Automatic Cell
TOP
BOT
PROG
SEL
20
LTC3625/LTC3625-1
= 0
= 50F
= 100F
40
= 61.9k
60
TIME (SECONDS)
IN
V
80
OUT
and one programming resistor)
100
V
120
MID
140
Balancing
160
3625 TA01b
180
200

3625f

Related parts for LTC3625IDE#PBF

LTC3625IDE#PBF Summary of contents

Page 1

... Wireless Power Meters n High Peak Power Boosted Supplies n L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical applicaTion 1A SCAP Charger LTC3625 ...

Page 2

... TAPE AND REEL LTC3625EDE#PBF LTC3625EDE#TRPBF LTC3625EDE-1#PBF LTC3625EDE-1#TRPBF LTC3625IDE#PBF LTC3625IDE#TRPBF LTC3625IDE-1#PBF LTC3625IDE-1#TRPBF 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. ...

Page 3

T SYMBOL PARAMETER I Input Operating Current, VIN 0µA, No Switching SW1 SW2 Input Sleep Current Input SD Current Current VOUT OUT V Sleep ...

Page 4

LTC3625/LTC3625-1 elecTrical characTerisTics Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTC3625/LTC3625-1 ...

Page 5

Typical perForMance characTerisTics T = 25° 3.3µ 3.3µ 10µ Buck Input Power vs R PROG 5. 2.65V PROG 7 MID CLAMPED CTL = ...

Page 6

LTC3625/LTC3625-1 Typical perForMance characTerisTics T = 25° 3.3µ 3.3µ 10µ Charge Profile Into Matched SuperCaps 3.6V 3. SEL OUT R = 143k PROG ...

Page 7

FuncTions V (Pin 10): Midpoint of Two Series Supercapacitors. MID The pin voltage is monitored and used, along with V to enable or shut down the buck and boost converters during charging to achieve voltage balancing of the top ...

Page 8

LTC3625/LTC3625-1 operaTion The LTC3625/LTC3625-1 are dual cell supercapacitor char- gers. Their unique topology charges two series connected capacitors to a fixed output voltage with programmable charging current without overvoltaging either of the cells — even if they are severely mismatched. ...

Page 9

Single Inductor Operation With the CTL pin tied to V the LTC3625/LTC3625-1 will IN operate in single inductor mode. In this mode the same inductor serves in the power path for both the buck and the boost converters. Thus, ...

Page 10

LTC3625/LTC3625-1 operaTion converter will turn off. Once V MID the V threshold, the boost converter will be MID(GOOD) re-enabled. In the case where V converter will operate in trickle charge mode until V exceeds V (see Boost Converter). MID 3. ...

Page 11

Programming Charge Current/Maximum Input Current The C charge current is programmed with a single BOT resistor connecting the PROG pin to ground. The program resistor and buck output current are calculated using the following equation ...

Page 12

LTC3625/LTC3625-1 applicaTions inForMaTion The buck and boost converters are designed to work with inductors over a wide range of inductances. Choosing a higher valued inductor will decrease operating frequen- cies, while a lower valued inductor will increase frequency but also ...

Page 13

Failure to make thermal contact between the exposed pad on the backside of the package and the copper board will result in higher thermal resistances. Furthermore, due to its potentially high frequency switch- ing circuitry, it ...

Page 14

LTC3625/LTC3625-1 Typical applicaTions D1 CMSH3- SOLAR PANEL C4 6.0V OPEN CIRCUIT 390µF 4.4V MPP 16V OUT CTL SW1 R1 LTC3625 EN SW2 C1 287k 10µF PFI V MID R2 V GND SEL 100k GND ...

Page 15

... ALL DIMENSIONS ARE IN MILLIMETERS Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. 12V Power Ride-Through ...

Page 16

... V OUT 4.8V/5.3V C2 ≥ 0.1F C3 ≥ 0.1F : 2.2V to 16V, IN < 1µA, ThinSOT TM Package SD < 1µA, 2mm × 3mm 6-Lead DFN Package SD < 1µA, 3mm × 3mm 10-Lead DFN Driver SD LT 0710 • PRINTED IN USA  LINEAR TECHNOLOGY CORPORATION 2010 3625f ...

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