DC/DC Converter. LV1482SN Datasheet

LV1482SN Converter. Datasheet pdf. Equivalent


ZillTek LV1482SN
LV1482SN
2A, 20V, 550KHz, Synchronous Step-Down DC/DC Converter
FEATURES
4.75V to 20V input voltage
Output adjustable from 0.923V to 18V
Output current up to 2A
Integrated 0.085Ω power MOSFET switches
Shutdown current 1μA typical
Efficiency up to 93%
550KHz fixed frequency
Programmable soft start
Over current protection
Over temperature protection
RoHS Compliant and 100% Lead (Pb) Free
APPLICATIONS
Distributed power systems
Networking systems
FPGA, DSP, ASIC power supplies
Notebook computers
Green electronics or appliance
ORDERING INFORMATION
PART
PACKAGE RoHS
LV1482SN SOP-8L (EP) Yes
Ship, Quantity
Tape and Reel
DESCRIPTION
The LV1482SN is a 550KHz fixed frequency
PWM synchronous step-down regulator. The
LV1482SN is operated from 4.75V to 20V, the
generated output is adjustable from 0.923V to
18V, and the output current can be up to 2A.
The integrated two MOSFET switches is with
turn on resistance of 0.085Ω. Current mode
control provides fast transient response and
cycle-by-cycle over current protection. The
shutdown current is 1μA typical. Adjustable
soft start prevents inrush current at turn on.
The LV1482SN is with thermal shutdown.
The LV1482SN is RoHS compliant and 100%
lead (Pb) free.
Pins Configuration
Top View (with EP)
BS 1
8 SS
IN 2
SW 3
GND 4
Exposed
Pad
connect
to GND
7 EN
6 COMP
5 FB
Typical Application Circuit
Note: R5 and C7 are optional.
Details please see the DVT report.
DS-21; Apr. 09, 2012
Copyright © ZillTek Technology Corp.
-1-
4F-3, No.5, Technology Rd., Science-Based
Industrial Park, Hsinchu 30078, Taiwan
Tel: (886) 3577 7509; Fax: (886) 3577 7390
Email: sales@zilltek.com


LV1482SN Datasheet
Recommendation LV1482SN Datasheet
Part LV1482SN
Description Synchronous Step-Down DC/DC Converter
Feature LV1482SN; LV1482SN 2A, 20V, 550KHz, Synchronous Step-Down DC/DC Converter FEATURES ● 4.75V to 20V input volta.
Manufacture ZillTek
Datasheet
Download LV1482SN Datasheet




ZillTek LV1482SN
LV1482SN
Absolute Maximum Ratings
Supply Voltage VIN ……………………………….... –0.3V to +21V
Switch Node VSW ………………………………. –0.3V to VIN+0.3V
Boost VBS ………………………………………. VSW–0.3V to VSW+6V
All Other Pins …………………………………………… –0.3V to +6V
Junction Temperature ………………………………………. +150°C
Lead Temperature …………………………………………….. +260°C
Operating Temperature Range ……...…… –40°C to +85°C
Storage Temperature Range …………....... –65°C to +150°C
CAUTION: Stresses above those listed in “Absolute
Maximum Ratings” may cause permanent damage to
the device. This is a stress only rating and operation of
the device at these or any other conditions above those
indicated in the operational sections of this specification
is not implied.
Electro-Static Discharge Sensitivity
This integrated circuit can be damaged by ESD.
It is recommended that all integrated circuits
be handled with proper precautions. Failure
to observe proper handling and installation procedures
can cause damage. ESD damage can range from subtle
performance degradation to complete device failure.
Package Thermal Characteristics
Thermal Resistance, θJA ……………………………………. 90°C/W
Thermal Resistance, θJC ……………………………………. 45°C/W
Pins Description
Pin Symbol
Description
1 BS High-side gate drive boost input.
2 IN Power input.
3 SW Power switching output.
4 GND Ground.
5 FB Feedback input.
6 COMP Compensation node.
7 EN Enable input.
8 SS Soft start control input.
Functional Block Diagram
DS-21; Apr. 09, 2012
Copyright © ZillTek Technology Corp.
-2-
4F-3, No.5, Technology Rd., Science-Based
Industrial Park, Hsinchu 30078, Taiwan
Tel: (886) 3577 7509; Fax: (886) 3577 7390
Email: sales@zilltek.com



ZillTek LV1482SN
LV1482SN
Electrical Specifications
(TA = +25°C, VIN = +12V, unless otherwise noted.)
PARAMETER
Symbol TEST CONDITIONS
Supply Voltage
Output Voltage
Shutdown Supply Current
Supply Current
Feedback Voltage
Feedback Over-voltage Threshold
Error Amplifier Voltage Gain *
Error Amplifier Transconductance
High-Side Switch-On Resistance *
Low-side Switch-On Resistance *
High-Side Switch Leakage Current
Upper Switch Current Limit
Lower Switch Current Limit
COMP to Current Sense Transconductance
Oscillation Frequency
Short Circuit Oscillation Frequency
Maximum Duty Cycle
Minimum On Time *
EN Shutdown Threshold Voltage
EN Shutdown Threshold Voltage Hysteresis
EN Lockout Threshold Voltage
EN Lockout Hysteresis
Input Under Voltage Lockout Threshold
Input Under Voltage Lockout Threshold
Hysteresis
Soft-Start Current
Soft-Start Period
Thermal Shutdown *
* Guaranteed by design, not tested.
VIN
VOUT
VFB
VEN = 0V
VEN = 2.0V, VFB = 1.0V
4.75V ≤ VIN ≤ 20V
AEA
GEA
RDS(ON)1
RDS(ON)2
GCS
FOSC1
FOSC2
DMAX
ΔIC = ±10μA
VEN = 0V, VSW = 0V
Minimum Duty Cycle
From Drain to Source
VFB = 0V
VFB = 0.78mV
VEN Falling
VIN Rising
VSS = 0V
CSS = 0.1μF
MIN
4.75
0.923
0.900
2.4
TYP
1
1.3
0.923
1.1
400
800
85
85
4
1.1
3.5
550
170
90
140
1.39
210
1.64
210
4.10
210
6
15
160
MAX
20
18
3.0
1.5
0.946
10
UNIT
V
V
µA
mA
V
V
V/V
µA/V
µA
A
A
A/V
KHz
KHz
%
ns
V
mV
V
mV
V
mV
µA
ms
°C
DS-21; Apr. 09, 2012
Copyright © ZillTek Technology Corp.
-3-
4F-3, No.5, Technology Rd., Science-Based
Industrial Park, Hsinchu 30078, Taiwan
Tel: (886) 3577 7509; Fax: (886) 3577 7390
Email: sales@zilltek.com





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