LTC3521 LINER [Linear Technology], LTC3521 Datasheet - Page 2

• Manufacturer Part Number: LTC3521
• Description: Wide VIN, 1A Buck-Boost DC/DC and Dual 600mA Buck DC/DC Converters
• Manufacturer: LINER [Linear Technology]

absoluTe MaxiMuM raTinGs
elecTrical characTerisTics
LTC3521
PV
SW1A, SW1B, SW2, SW3 Voltage
Voltage, All Other Pins ................................. –0.3V to 6V
orDer inForMaTion
junction temperature range, otherwise specifications are at T
PARAMETER
Input Voltage
Quiescent Current—Shutdown
Burst Mode Quiescent Current
pin conFiGuraTion
LEAD FREE FINISH
LTC3521EUF#PBF
LTC3521EFE#PBF
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to:
For more information on tape and reel specifications, go to:

IN1
DC ............................................................ –0.3V to 6V
Pulsed < 100ns ........................................... –1V to 7V
UNDERSIDE METAL INTERNALLY CONNECTED TO V
, PV
EXPOSED PAD (PIN 21) IS GND AND MUST BE SOLDERED TO PCB GROUND
IN2
Voltage .................................... –0.3V to 6V
PGOOD3
PGOOD2
PGOOD1
SHDN2
T
PWM
JMAX
GND
FB3
FB2
FB1
V
IN
= 150°C, θ
20-LEAD PLASTIC TSSOP
TAPE AND REEL
LTC3521EUF#TRPBF
LTC3521EFE#TRPBF
10
1
2
3
4
5
6
7
8
9
FE PACKAGE
TOP VIEW
JA
GND
21
= 40°C/W (NOTE 4)
–
20
19
18
17
16
15
14
13
12
11
(PCB CONNECTION OPTIONAL)
PV
SW2
PGND2
SW3
V
SW1A
SW1B
PV
SHDN1
SHDN3
CONDITIONS
V
V
OUT1
SHDN1
FB1
IN2
IN1
http://www.linear.com/leadfree/
= 0.66V, V
PART MARKING
3521
LTC3521FE
http://www.linear.com/tapeandreel/
= V
SHDN2
FB2
The
= V
J
= 0.66V, V
= 25°C. V
(Note 1)
l
SHDN3
denotes the specifications which apply over the full operating
= 0V
Operating Junction Temperature Range
(Note 2) .................................................... –40°C to 85°C
Maximum Junction Temperature (Note 5)............. 125°C
Storage Temperature Range ................... –65°C to 150°C
FB3
IN
= 0.66V, V
= 3.6V, V
EXPOSED PAD (PIN 25) IS GND AND MUST BE SOLDERED TO PCB GROUND
PACKAGE DESCRIPTION
24-Lead (4mm × 4mm) Plastic QFN
20-Lead Plastic TSSOP
PGOOD3
PGOOD2
PGOOD1
PWM
SHDN2
OUT1
GND
V
= 0V
IN
24-LEAD (4mm 4mm) PLASTIC QFN
= 3.3V, unless otherwise noted.
1
2
3
4
5
6
T
JMAX
24 23 22 21 20 19
7
l
l
= 125°C, θ
8
UF PACKAGE
TOP VIEW
9
GND
25
MIN
1.8
10 11 12
JA
= 37°C/W
0.01
TYP
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 85°C
30
18
17
16
15
14
13
PGND2
SW3
V
SW1A
SW1B
NC
OUT1
MAX
5.5
2
UNITS
3521f
µA
µA
V