LT1942EUF#PBF Linear Technology, LT1942EUF#PBF Datasheet - Page 12

• 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

APPLICATIO S I FOR ATIO
LT1942
12
U
SHUTDOWN
I
Q
U
< 1µA
10V/DIV
10V/DIV
10V/DIV
5V/DIV
5V/DIV
1V/DIV
V
V
AVDD
SHDN
START
V
Figure 2. Power Sequencing During TFT Supply Start-Up
(Refer to Figure 4 Node Names)
V
W
V
V
V
V
OFF
SHDN
ON
D3
C1
SHDN
AV
V
V
OFF
TFT SUPPLY
ON
SEQUENCE
COMPLETE
DD
> 1V
DISABLED
DISABLED
< 0.4V
ENABLED
Figure 1. Power Sequencing State Diagram
U
FB1 > (97% OF 1.25V)
2ms/DIV
OUTPUT DISCONNECT
PGOOD GOES LOW
PNP TURNS ON
1942 F02
CT TIMER STARTS
V
CT
≥ V
1942 F01
BE
V
V
OFF
ON
ENABLED
ENABLED
1942fb