LT1942EUF#PBF Linear Technology, LT1942EUF#PBF Datasheet - Page 2

• Manufacturer Part Number: LT1942EUF#PBF
• Description: IC REG SW QUAD TFT LCD 24-QFN
• Manufacturer: Linear Technology

Specifications of LT1942EUF#PBF

• Applications: Converter, TFT
• Voltage - Input: 2.6 ~ 16 V
• Number Of Outputs: 4
• Voltage - Output: 1.25 ~ 36 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-QFN
• Primary Input Voltage: 16V
• No. Of Outputs: 4
• Output Current: 750mA
• No. Of Pins: 24
• Operating Temperature Range: -40°C To +85°C
• Msl: MSL 1 - Unlimited
• Supply Voltage Range: 2.6V To 16V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ABSOLUTE AXI U RATI GS
LT1942
(Note 1)
V
SW1, SW2, SW3 Voltage .......................... –0.4V to 36V
SW4 .......................................................... –0.4V to 45V
FB1, FB3 Voltage ................................................... 2.5V
FB4 Voltage ....................................................... 400mV
NFB2 Voltage ................................................... –200mV
SHDN Voltage ......................................................... 10V
CTRL4 Voltage ........................................................ 16V
SS1, SS4 Voltage .................................................. 1.5V
Current Into D2 ......................................................... 1A
D2 Voltage ............................................................ –36V
Current Out of D3 ..................................................... 1A
D3 Voltage .............................................................. 36V
Current Out of D4 ..................................................... 4A
D4 Voltage .............................................................. 45V
LED1, LED2 Voltage ............................................... 45V
Current Into LED1, LED2 ..................................... 35mA
PGOOD Voltage ...................................................... 16V
V
CT Current ........................................................... ±1mA
Maximum Junction Temperature ......................... 125°C
Operating Temperature Range (Note 2) .. – 40°C to 85°C
Storage Temperature Range ................ – 65°C to 125°C
ELECTRICAL CHARACTERISTICS
PARAMETER
Quiescent Current
Input Voltage Range
AV
AV
AV
V
V
V
V
LED Feedback Voltage
LED Feedback Pin Bias Current (FB4)
LED Feedback Voltage with Dimming
2
temperature range, otherwise specifications are at T
OFF
OFF
ON
ON
CC
OUT3
DD
DD
DD
Feedback Voltage
Feedback Pin Bias Current (FB3)
Feedback Voltage
Feedback Pin Bias Current (NFB2)
Voltage............................................................. 16V
Feedback Voltage
Feedback Pin Bias Current (FB1)
Feedback Voltage for Power Good Signal
Voltage ......................................................... 36V
W
W W
CONDITIONS
V
V
NFB2 Pin
FB4 Pin, V
V
FB1 Pin
FB1 Pin (Note 3)
FB1 Pin Voltage as a Percent of Nominal Voltage
NFB2 Pin (Note 3)
FB3 Pin
FB3 Pin (Note 3)
FB4 Pin (Note 3)
FB4 Pin, V
U
SHDN
SHDN
CC
A
Pin
= 25°C. V
= 3.3V, V
= V
CTRL4
CTRL4
CTRL4
The
●
CTRL4
= 0V, In Shutdown
= 3.3V
IN
= 1V
denotes the specifications which apply over the full operating
= 3.3V, V
= 0V, Not Switching
PACKAGE/ORDER I FOR ATIO
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking:
PGND23
V
NFB2
SW3
OUT3
FB3
SHDN
D3
T
JMAX
24-LEAD (4mm × 4mm) PLASTIC QFN
1
2
3
4
5
6
EXPOSED PAD (PIN 25) IS SGND
= 125°C, θ
(MUST BE SOLDERED TO PCB)
= V
24 23 22 21 20 19
7
IN
, unless otherwise noted. (Note 2)
8
UF PACKAGE
TOP VIEW
JA
9
= 37°C/W, θ
25
http://www.linear.com/leadfree/
10 11 12
●
●
●
●
●
●
JC
= 4.3°C/W
1.225
1.225
–160
MIN
190
2.6
95
85
18
17
16
15
14
13
LED1
LED2
D4
FB4
FB1
PGOOD
U
–150
TYP
1.25
1.25
200
15
97
25
25
20
95
7
0
ORDER PART
W
LT1942EUF
MARKING
1.275
1.275
NUMBER
UF PART
–140
MAX
100
210
105
10
16
60
60
60
60
1
1942
UNITS
U
1942fb
mA
mV
mV
mV
µA
nA
nA
nA
µA
%
V
V
V