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PDF LV5761V Data sheet ( Hoja de datos )
| Número de pieza | LV5761V | |
| Descripción | 1-channel Step-down Switching Regulator | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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Ordering number : ENA1443A
LV5761V
Bi-CMOS LSI
1-channel Step-down
Switching Regulator
http://onsemi.com
Overview
The LV5761V is a 1-channel step-down switching regulator.
Functions
• 1 channel step-down switching regulator controller.
• Frequency decrease function at pendent.
• Load-independent soft start circuit.
• ON/OFF function.
• Built-in pulse-by-pulse OCP circuit. It is detected by using ON resistance of an external MOS.
• Synchronous rectification.
• Current mode control.
• Synchronous drive by external signal.
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
supply voltage
Allowable Power dissipation
Symbol
VIN max
Pd max
Conditions
Mounted on a specified board. *
Operating temperature
Topr
Storage temperature
Tstg
* Specified board: 114.3mm × 76.1mm × 1.6mm, glass epoxy board
Ratings
45
0.74
-40 to +85
-55 to +150
Unit
V
W
°C
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Recommended Operating Range at Ta = 25°C
Parameter
Supply voltage range
Error amplifier input voltage
Symbol
VIN
Conditions
Ratings
8.5 to 42
0 to 1.6
Unit
V
V
Semiconductor Components Industries, LLC, 2013
August, 2013
90909 SY / 41509 MS 20090401-S00011 No.A1443-1/6
1 page  
LV5761V
Timing Chart
When the MODE pin is set to the high level and the point of the over current detection is set by using the ILIM pin is
exceeded, the value becomes double the original value.
Also, when the MODE pin is set to the low level, the point of over current detection remains an original value.
Timing chart of the over current detection point switching is as below.
MODE = HIGH
OCP
over current detection point during High MODE
over current detection point during Low MODE
Load Current
t
1.25V
0V
current limit × 2A
For example 6A
current limit × 1A
For example 3A
Sample Application Circuit
VIN = 8 to 42V
C1 C7
R5 C6
SYNC
H/L
ON/OFF
R2
C5
C3
14 15
5 SYNCVIN
ILIM
CBOOT 7
12 MODE
HDRV 8
3 EN
SW 6
16 SS
LDRV 9
2 COMP
FB 1
4 RT
R7
GND OCP VDD 10
11 13
C11
C2
C8
Q1
L
Q2 R4 C4
C9
R3
OUT
C10
No.A1443-5/6
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet LV5761V.PDF ] | |
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