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LTC4020 Datasheet(PDF) 2 Page - Linear Technology

Part # LTC4020
Description  55V Buck-Boost Multi-Chemistry Battery Charger
Download  42 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4020 Datasheet(HTML) 2 Page - Linear Technology

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background image
LTC4020
2
4020fb
For more information www.linear.com/LTC4020
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
PVIN, SENSVIN............................................. –0.3 to 60V
BST1, BST2.................................................. –0.3 to 66V
SW1, SW2........................................................–2 to 60V
SENSVIN – PVIN........................................... –0.3 to 60V
BST1 – SW1, BST2 – SW2............................. –0.3 to 6V
SENSVIN – SENSTOP, SENSBOT –
SENSGND ....................................................–0.3 to 0.3V
CSP, CSN ..................................................... –0.3 to 60V
CSP – CSN...................................................–0.3 to 0.3V
STAT1, STAT2, SHDN ................................... –0.3 to 60V
VFBMAX, VINREG, VFB, VFBMIN, BAT, FBG....... –0.3 to 60V
MODE............................................................. –0.3 to 6V
Status Pin Currents:
STAT1, STAT2 ......................................................5mA
Operating Junction Temperature
Range (Note 2)....................................... –40°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
(Note 1)
13 14 15 16
TOP VIEW
39
SGND
UHF PACKAGE
38-LEAD PLASTIC QFN (5mm
× 7mm)
17 18 19
38 37 36 35 34 33 32
24
25
26
27
28
29
30
31
8
7
6
5
4
3
2
1
TG1
BST1
SGND
SENSGND
SENSBOT
SENSTOP
SENSVIN
RT
SHDN
VIN_REG
MODE
STAT1
TG2
BST2
SGND
VC
ITH
VFBMAX
ILIMIT
CSOUT
CSP
CSN
BGATE
BAT
23
22
21
20
9
10
11
12
TJMAX = 125°C, θJA = 34°C/W, θJC = 2°C/W
EXPOSED PAD (PIN 39) IS SGND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC4020EUHF#PBF
LTC4020EUHF#TRPBF
4020
38-Lead (5mm × 7mm) Plastic QFN
–40°C to 125°C
LTC4020IUHF#PBF
LTC4020IUHF#TRPBF
4020
38-Lead (5mm × 7mm) Plastic QFN
–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.
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/
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Buck-Boost Switching Converter
VIN
Operating Voltage Range
PVIN; SENSVIN
l
4.5
55
V
UVLO
VIN Supply UVLO (Rising)
VIN Supply UVLO Hysteresis
DC/DC Functions Enabled
VIN Falling
l
3.6
4.0
0.4
4.4
V
V
SENSVIN Supply UVLO (Rising)
SENSVIN UVLO Hysteresis
INTVCC Enabled
SENSVIN Falling
3.4
0.3
V
V
BST Supplies UVLO (Rising)
BST Supplies UVLO Hysteresis
BST1 – SW1; BST2 – SW2;
SW1, SW2 = 0V
l
3.0
3.3
0.4
3.8
V
V
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at TA = 25°C (Note 2). PVIN = SENSVIN = CSP = CSN = BAT = 20V, SHDN = 2V,
C(TG1, BG1, TG2, BG2) = 1000pF, VRNG/SS = 2V.


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