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Silan Microelectronics

SD45216RJATR Datasheet Preview

SD45216RJATR Datasheet

HIGH EFFICIENCY STEP-DOWN DC/DC CONVERTER

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SD45216_Datasheet
HIGH EFFICIENCY STEP-DOWN DC/DC CONVERTER WITH
ADJUSTABLE CURRENT LIMIT FOR AUTOMOTIVE APPLICATIONS
DESCRIPTION
The SD45216 is a high efficiency step down DC-DC converter
with adjustable current limit in compact ESOP-8 package,
including an error amplifier, ramp generator, current comparator,
slope compensation, current sense and logic driver. It also
integrates a current error amplifier to have a constant voltage
and constant current control.
Peak current mode PWM control with external adjustable
compensation provides a stable and high efficient operation over
ESOP-8-225-1.27
(With heatsink at the bottom)
a wide range of load currents. By means of an on board current
sense resistor and the availability of the current sense pins, a
current limit programming is very simple and accurate.
The internal robust PMOS transistor with a typical of 100 m
assures high efficiency even at high output current level. The APPLICATIONS
internal limiting current of typical value of 3.5 A, output short and
over temperature protection, protect the device from accidental
damage.
The internal fixed switching frequency of 120 kHz, and the
ESOP-8 package pin allow building an ultra compact DC/ DC
converter with a minimum board space.
* Automotive applications
* Chargers for NiCd, NiMH batteries
* Simple step-down converters with
adjustable current limit
* Adjustable current generator
FEATURES
* Up to 2.1A output current
* Up to 90% Efficiency
* Operating voltage can be up to 40V
* 120 kHz Internal Jitter Frequency for lower EMI
* Patent -Pending Short Circuit Protection
* Patent -Pending Output Voltage Compensation
* Adjustable current limit
* Over Temperature Protection
* Small SOP-8 Package
ORDERING INFORMATION
Part No.
SD45216JA
SD45216JATR
SD45216RJA
SD45216RJATR
Package
ESOP-8-225-1.27
ESOP-8-225-1.27
ESOP-8-225-1.27
ESOP-8-225-1.27
Marking
45216JA
45216JA
5216RJA
5216RJA
Material
Pb free
Pb free
Pb free
Pb free
Packing
Tube
Tape&Reel
Tube
Tape&Reel
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV:1.6
2011.11.18
Page 1 of 8




Silan Microelectronics

SD45216RJATR Datasheet Preview

SD45216RJATR Datasheet

HIGH EFFICIENCY STEP-DOWN DC/DC CONVERTER

No Preview Available !

SD45216_Datasheet
BLOCK DIAGRAM
VIN
1
Internal
Regulators
CHRG
7
AVCC
CS- 0.075V
5
CS+
6
Oscillator
120kHz
Current
Error amplifier
FB
4
0.835V
Voltage
Error amplifier
Current Sense
+ + Amplifier
S
CLK
AVCC
S
PWM
Comparator
Q
RR
COMP
2
Protection
SW 8
GND 3
ABSOLUTE MAXIMUM RATINGS (Tamb=25°C)
Characteristics
VIN Supply Voltage
SW Voltage
COMP Voltage
FB Voltage
CS+ Voltage
CS- Voltage
Open Drain Charge Indication Pin Voltage
Operating Temperature Range
Storage Temperature Range
Symbol
VIN
VSW
VCOMP
VFB
VCS+
VCS-
VCHRG
Tamb
TSTG
Rating
+42
-0.3 ~ +42
-0.3 ~ +6
-0.3 ~ +6
-0.3 ~ +6
-0.3 ~ +6
-0.3 ~ +6
-20 ~ + 85
-40 ~ +125
Unit
V
V
V
V
V
V
V
°C
°C
ELECTRICAL CHARACTERISTICS (Tamb=25°C, VIN=12V, VOUT=5V, Load Current=0 unless otherwise
specified)
Characteristics
Operating Voltage
Feedback Reference Voltage
Feedback Current
Symbol
VIN
VFB
IFB
Test condition
VIN pin voltage
VFB=0.81V
Min.
--
0.815
--
Typ.
--
0.835
-0.1
Max.
40
0.855
--
Unit
V
V
μA
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV:1.6
2011.11.18
Page 2 of 8


Part Number SD45216RJATR
Description HIGH EFFICIENCY STEP-DOWN DC/DC CONVERTER
Maker Silan Microelectronics
Total Page 8 Pages
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