LT1942EUF#PBF Linear Technology, LT1942EUF#PBF Datasheet - Page 3

• 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

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
PARAMETER
LED1-LED2 Current Matching
LED1 Voltage
LED2 Voltage
LED1, LED2 Maximum Current
LED1, LED2 Leakage Current
AV
V
V
LED Maximum Duty Cycle
AV
AV
V
V
V
V
LED Switch Current Limit at Minimum DC (SW4)
LED Switch Current Limit at Maximum DC (SW4)
V
V
V
V
LED Schottky Diode Forward Drop
LED Schottky Diode Leakage Current
Switching Frequency
SHDN Pin Current
CTRL4 Pin Current
SW1-SW4 leakage Current
SW1 V
SW2 V
SW3 V
SW4 V
SS1 Charging Current
SS4 Charging Current
SHDN Input Voltage High
SHDN Input Voltage Low
CTRL4 Input Voltage High
CTRL4 Input Voltage Low
OFF
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
DD
DD
DD
Maximum Duty Cycle
Switch Current Limit at Minimum DC (SW3)
Switch Current Limit at Maximum DC (SW3)
Schottky Diode Forward Drop
Schottky Diode Leakage Current
Maximum Duty Cycle
Switch Current Limit at Minimum DC (SW2)
Switch Current Limit at Maximum DC (SW2)
Schottky Diode Forward Drop
Schottky Diode Leakage Current
Maximum Duty Cycle
Switch Current Limit at Minimum DC (SW1)
Switch Current Limit at Maximum DC (SW1)
CESAT
CESAT
CESAT
CESAT
CONDITIONS
Current Into Each Pin = 20mA, V
Current Into Each Pin = 20mA, |V
20mA Into Pin, V
20mA Into Pin, V
Into Either Pin, V
V
SW1 Pin
SW2 Pin
SW3 Pin
SW4 Pin
SW1 Pin (Note 4)
SW1 Pin (Note 4)
SW2 Pin (Note 4)
SW2 Pin (Note 4)
SW3 Pin (Note 4)
SW3 Pin (Note 4)
SW4 Pin (Note 4)
SW4 Pin (Note 4)
D2 Pin, I = 60mA
D2 Pin, V
D3 Pin, I = 60mA
V
I = 250mA
V
V
V
V
V
V
I
I
I
I
V
V
SW1
SW2
SW3
SW4
SHDN
D3
D4
SHDN
SHDN
CTRL4
CTRL4
SWX
SS
SS
A
= 36V, SW3 = 0V, Output Disconnect PNP Off
= 36V, SW4 = 0V
= 0.5V
= 0.5V
= 100mA (Note 5)
= 40mA (Note 5)
= 40mA (Note 5)
= 400mA (Note 5)
= 25°C. V
= 36V
= 0V, V
= 3V
= 0V
= 3V
= 0V
D2
The
= –36V
LEDX
●
IN
LEDX
LED2
LED1
denotes the specifications which apply over the full operating
= 3.3V, V
= 45V
< 1.5V, FB4 = 0
= 2V, FB4 = 0
= 2V, FB4 = 0
SHDN
LED1
LED1
= V
-V
= V
IN
LED2
LED2
, unless otherwise noted. (Note 2)
| = 1V
●
●
●
●
●
●
●
0.25
MIN
150
550
450
0.8
35
88
75
75
88
80
50
30
50
30
1
1
1
TYP
0.65
0.65
0.75
0.01
200
140
750
600
–60
200
150
150
280
93
86
86
93
80
60
80
60
70
20
30
0
1
1
1
1
3
3
–150
MAX
LT1942
250
200
110
110
900
850
100
300
250
250
400
1.5
2.5
1.2
1.2
1.2
0.4
0.1
90
90
30
60
5
5
1
1
1
1
1
UNITS
1942fb
3
MHz
mA
mA
mA
mA
mA
mA
mA
mA
mA
mV
mV
mV
mV
µA
µA
µA
µA
µA
nA
µA
nA
µA
µA
µA
%
%
%
%
%
%
V
V
V
V
V
V
V
V
V