LV5771QA Datasheet, PDF (1/12 Pages) ON Semiconductor – Step-down Voltage Switching Regulator

Ordering number : ENA2178
LV5771QA
Bi-CMOS IC
Step-down Voltage Switching Regulator
http://onsemi.com
Overview
LV5771QA is a step-down voltage switching regulator.
Features and Functions
• Wide Input dynamic range: 8V to 42V
• Current mode type
• Built-in pulse-by-pulse OCP cicuit: detects over current by using ON resistance of an external of an external MOS
external resistance for over current detection.
• Over current protection: HICCUP MODE
• Built-in output voltage correction circuit
• Droops when frequency FOLD BACK is negative
• Teermal shutdown
• Fixed frewuency: 1MHz
• Load-independent soft start circuit
• Over voltage protection
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Supply voltage
VIN, SW
HDRV, CBOOT
Symbol
VIN max
Conditions
Ratings
Unit
45
V
45
V
52
V
LDRV
Between CBOOT and SW,
Between CBOOT and HDRV
EN, ILIM
Between VIN and ILIM
VDD
SS, COMP, FB, SDIN
SNS_OCP, SNS_COM,
SNS_CS
Allowable Power dissipation
Operating temperature
Storage temperature
Junction temperature
Pd max
Topr
Tstg
Tj max
Mounted on a specified board. *
6
V
6
V
VIN+0.3
V
1
V
6
V
VDD+0.3
V
7
V
0.65
W
-40 to +85
°C
-55 to +150
°C
150
°C
* Specified board: 24.0mm × 15.0mm × 1.6mm, glass epoxy 2-layer board.
Caution 1) Absolute maximum ratings represent the values which cannot be exceeded for any length of time.
Caution 2) Even when the device is used within the range of absolute maximum ratings, as a result of continuous usage under high temperature, high current,
high voltage, or drastic temperature change, the reliability of the IC may be degraded. Please contact us for the further details.
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.
ORDERING INFORMATION
See detailed ordering and shipping information on page 12 of this data sheet.
Semiconductor Components Industries, LLC, 2013
May, 2013
51513NKPC 20130401-S00002 No.A2178-1/12