Datasheet
LTC4020
2
4020fd
For more information www.linear.com/LTC4020
pin conFiguraTionabsoluTe MaxiMuM raTings
PV
IN
, SENSVIN ............................................. –0.3 to 60V
BST1, BST2 .................................................. –0.3 to 66V
SW1, SW2 ........................................................–2 to 60V
SENSVIN – PV
IN
........................................... –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
V
FBMAX
, V
INREG
, V
FB
, V
FBMIN
, 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
1TG1
BST1
SGND
SENSGND
SENSBOT
SENSTOP
SENSVIN
RT
SHDN
V
IN_REG
MODE
STAT1
TG2
BST2
SGND
VC
ITH
V
FBMAX
I
LIMIT
CSOUT
CSP
CSN
BGATE
BAT
SW1
BG1
PV
IN
PGND
INTV
CC
BG2
SW2
STAT2
TIMER
RNG/SS
NTC
VFB
FBG
V
FBMIN
23
22
21
20
9
10
11
12
T
JMAX
= 125°C, θ
JA
= 34°C/W, θ
JC
= 2°C/W
EXPOSED PAD (PIN 39) IS SGND, MUST BE SOLDERED TO PCB
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/. Some packages are available in 500 unit reels through
designated sales channels with
#TRMPBF suffix.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Buck-Boost Switching Converter
V
IN
Operating Voltage Range PV
IN
; SENSVIN
l
4.5 55 V
UVLO V
IN
Supply UVLO (Rising)
V
IN
Supply UVLO Hysteresis
DC/DC Functions Enabled
V
IN
Falling
l
3.6 4.0
0.4
4.4 V
V
SENSVIN Supply UVLO (Rising)
SENSVIN UVLO Hysteresis
INTV
CC
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 T
A
= 25°C (Note 2). PV
IN
= SENSVIN = CSP = CSN = BAT = 20V, SHDN = 2V,
C
(TG1, BG1, TG2, BG2)
= 1000pF, V
RNG/SS
= 2V.
orDer inForMaTion
(http://www.linear.com/product/LTC4020#orderinfo)
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