LT3570IFE#PBF Linear Technology, LT3570IFE#PBF Datasheet - Page 2

• Manufacturer Part Number: LT3570IFE#PBF
• Description: IC PWM BUCK BST DIV CM 20TSSOP
• Manufacturer: Linear Technology

Specifications of LT3570IFE#PBF

• Topology: Step-Down (Buck) (1), Step-Up (Boost) (1), Linear (LDO) (1)
• Function: Automotive
• Number Of Outputs: 3
• Frequency - Switching: 500kHz ~ 2.1MHz
• Voltage/current - Output 1: Adj to 0.8V, 1.5A
• Voltage/current - Output 2: Adj to 0.8V, 1.5A
• Voltage/current - Output 3: Controller
• W/led Driver: No
• W/supervisor: No
• W/sequencer: No
• Voltage - Supply: 2.5 V ~ 36 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: *
• Package / Case: 20-TSSOP Exposed Pad, 20-eTSSOP, 20-HTSSOP
• Frequency-max: 2.75MHz
• Duty Cycle: 95%
• Pwm Type: Current Mode
• Buck: Yes
• Boost: Yes
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: Yes
• Cuk: No
• Isolated: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ABSOLUTE MAXIMUM RATINGS
LT3570
V
BOOST Voltage .........................................................60V
BOOST Pin Above SW2 .............................................25V
NPN_DRV Voltage .......................................................8V
SW1 Voltage .............................................................40V
SHDN1, SHDN2, SHDN3 Voltage ..............................40V
SYNC, R
SS1, SS2 Voltage ........................................................3V
FB1, FB2, FB3 Voltage ...............................................10V
PIN CONFIGURATION
ORDER INFORMATION
LEAD FREE FINISH
LT3570EUF#PBF
LT3570IUF#PBF
LT3570EFE#PBF
LT3570IFE#PBF
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to:
For more information on tape and reel specifi cations, go to:
2
IN1
, V
IN2
T
, V
Voltage ........................................................3V
EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB
IN3
SW2
SW1
GND
GND
V
V
IN2
IN2
, V
24-LEAD (4mm 4mm) PLASTIC QFN
1
2
3
4
5
6
BIAS
24 23 22 21 20 19
T
7
JMAX
TAPE AND REEL
LT3570EUF#TRPBF
LT3570IUF#TRPBF
LT3570EFE#TRPBF
LT3570IFE#TRPBF
Voltage ..................................40V
8
UF PACKAGE
= 125°C, θ
TOP VIEW
9
25
10 11 12
JA
= 37°C/W
18
17
16
15
14
13
V
SS2
GND
R
SYNC
SHDN3
C2
http://www.linear.com/leadfree/
T
PART MARKING*
3570
3570
LT3570FE
LT3570FE
http://www.linear.com/tapeandreel/
(Note 1)
V
Maximum Junction Temperature........................... 125°C
Operating Temperature Range (Note 2).. –40°C to 125°C
Storage Temperature Range
Lead Temperature (Soldering, 10 sec)
C1
TSSOP ............................................... –65°C to 150°C
QFN .................................................... –65°C to 125°C
TSSOP Only ...................................................... 300°C
, V
PACKAGE DESCRIPTION
24-Lead (4mm × 4mm) Plastic QFN
24-Lead (4mm × 4mm) Plastic QFN
20-Lead Plastic TSSOP
20-Lead Plastic TSSOP
C2
EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB
Voltage ..........................................................3V
SHDN1
SHDN2
SHDN3
SYNC
SS2
FB1
FB2
FB3
V
R
C2
T
20-LEAD PLASTIC TSSOP
T
10
JMAX
1
2
3
4
5
6
7
8
9
= 125°C, θ
FE PACKAGE
TOP VIEW
21
JA
= 38°C/W
20
19
18
17
16
15
14
13
12
11
V
SS1
V
GND
SW1
SW2
V
BOOST
V
NPN_DRV
C1
IN1
IN2
IN3
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
3570fb