LT1076HVCT Linear Technology, LT1076HVCT Datasheet - Page 13

• Manufacturer Part Number: LT1076HVCT
• Description: IC SWTCHNG REG STP-DWN 2A TO-220
• Manufacturer: Linear Technology
• Type: Step-Down (Buck), Step-Up (Boost), Inverting, Flybackr

Specifications of LT1076HVCT

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 2.5 ~ 50 V
• Current - Output: 2A
• Frequency - Switching: 100kHz
• Voltage - Input: 8 ~ 64 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: TO-220-5 (Bent and Staggered Leads)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

TYPICAL APPLICATIO S
* = 1% FILM RESISTORS
D1 = MOTOROLA-MBR745
C1 = NICHICON-UPL1C221MRH6
C2 = NICHICON-UPL1A102MRH6
L1 = COILTRONICS-CTX25-5-52
20V
†
TO 35V
V
IN
**
+
*
†
PULSE ENGINEERING #PE±65282
MOTOROLA MBR2030CTL
IF INPUT VOLTAGE IS BELOW 20V,
MAXIMUM OUTPUT CURRENT WILL BE REDUCED. SEE AN44
+
U
C3
200
50V
**
**
††
†
GND
V
4.5V to
40V
µ
IN
V
R3 =
R1 = (R3) (1.86)
R2 = (R3) (3.65)
LOWER REVERSE VOLTAGE RATING MAY BE USED FOR LOWER INPUT VOLTAGES.
LOWER CURRENT RATING IS ALLOWED FOR LOWER OUTPUT CURRENT. SEE AN44.
LOWER CURRENT RATING MAY BE USED FOR LOWER OUTPUT CURRENT. SEE AN44.
R1, R2, AND C4 ARE USED FOR LOOP FREQUENCY COMPENSATION WITH LOW INPUT VOLTAGE,
BUT R1 AND R2 MUST BE INCLUDED IN THE CALCULATION FOR OUTPUT VOLTAGE DIVIDER VALUES.
FOR HIGHER OUTPUT VOLTAGES, INCREASE R1, R2, AND R3 PROPORTIONATELY.
FOR INPUT VOLTAGE > 10V, R1, R2, AND C4 CAN BE ELIMINATED, AND COMPENSATION IS
DONE TOTALLY ON THE V PIN.
MAXIMUM OUTPUT CURRENT OF 1A IS DETERMINED BY MINIMUM INPUT
VOLTAGE OF 4.5V. HIGHER MINIMUM INPUT VOLTAGE WILL ALLOW MUCH HIGHER
OUTPUT CURRENTS. SEE AN44.
F
IN
GND
Positive-to-Negative Converter with 5V Output
LT1074
LT1074HV
V
V
OUT
IN
V
C
–2.37 (KΩ)
Tapped-Inductor Buck Converter
V
V
V
C
SW
C3
0.1
FB
V
R3
1k
SW
FB
+
C2
0.2
µ
F
µ
F
C1
220
50V
C
µ
F
D3
1N5819
D2
35V
5W
L1
25
5A
D1
MBR745
3
µ
††
H
†
L1*
R2**
10k
R1**
5.1k
1
D1**
0.01
C4**
0.01
µ
µ
F
F
R1
2.8k
R2
2.21k
R3*
2.74k
R4
1.82k*
+
+
C1
4400
(2 EA
2200
16V)
5
L2
µ
C2
1000
10V
H
µ
µ
F
F,
LT1074 • TA03
+
µ
F
–5V,1A***
LT1074/LT1076
OPTIONAL FILTER
5
C4
390
16V
µ
V
5V, 10A
LT1074 •TA02
H
OUT
µ
F
†
–
+
200
10V
µ
F
sn1074 1074fds
13