LT1577CS-3.3/ADJ Linear Technology, LT1577CS-3.3/ADJ Datasheet - Page 14

• Manufacturer Part Number: LT1577CS-3.3/ADJ
• Description: IC LDO REG 3.3V/ADJ DUAL 16-SOIC
• Manufacturer: Linear Technology
• Type: Positive Fixed and Adjustabler

Specifications of LT1577CS-3.3/ADJ

• Number Of Outputs: 2
• Voltage - Output: 3.3V, Adjustable
• Current - Supply: 12mA
• Voltage - Input: 5 ~ 22 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 16-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

LT1575/LT1577
TYPICAL APPLICATIONS
14
Setting Output Voltage with the Adjustable LT1575
0V TO 5V
0V TO 5V
RESET
*I
R
R
ACTIVATING CURRENT LIMIT ALSO ACTIVATES
THE SHDN PIN TIMER
RESET
LIM
SENSE
SENSE
*C1 = 15 A(t)/1.11V
Shutdown Time-Out with Reset
Shutdown Time-Out with Reset
t = SHUTDOWN LATCHOFF TIME
= 50mV/R
*C2 = 15 A(t)/1.11V
t = SHUTDOWN LATCH-OFF TIME
= DISCRETE SHUNT RESISTOR OR
= KELVIN-SENSED PC BOARD TRACE
GATE
IPOS
INEG
100k
Setting Current Limit
R2
V
FB
OUT
R1
100k
SENSE
= 1.21V(1 + R2/R1)
R3
100k
V
V
OUT
OUT
Q1
VN2222L
Q2
R2
R1
R
SENSE
Q2
2N3904
1575 TA03
V
CC
U
*
1575 TA07
N
SHDN
C1*
1575 TA05
1575 TA09
SHDN
C2*
Setting Current Limit with Foldback Limiting
5V
Using “Sense-Less” Current Limit
C
T
SHDN
R4
549
GATE
RT1
10k
NTC
IPOS
INEG
Basic Thermal Shutdown
Overvoltage Protection
SHDN
GATE
IPOS
INEG
V
V
OUT(uth)
OUT(lth)
R6
1.2k
D1
1N4148
D2
1N4148
= 1.11(R6/R5) – 15 A(R6)
RT1 = DALE NTHS-1206N02
THERMALLY MOUNT RT1
IN CLOSE PROXIMITY
TO THE EXTERNAL
N-CHANNEL MOSFET
= 1.21(R6/R5) + 5 A(R6)
10
V
R5
OUT
C1
10 F
R6
R5
1575 TA10
10
1575 TA06
R3
SHDN
Q3
R4
V
V
V
OUT
CC
OUT
Q1
1575 TA08
V
1575 TA04
CC