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Silan Microelectronics

SD45216SAGTR Datasheet Preview

SD45216SAGTR 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 SOP-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
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 P-channel DMOS transistor with a typical of
100 massures high efficiency even at high output current level.
The internal limiting current of typical value of 3 A, output short
and over temperature protection, protect the device from
APPLICATIONS
accidental damage.
* Automotive applications
The internal fixed switching frequency of 120 kHz, and the * Chargers for NiCd, NiMH batteries
SOP-8 package pin allow building an ultra compact DC/ DC * Simple step-down converters with
converter with a minimum board space.
adjustable current limit
FEATURES
* Adjustable current generator
* Up to 2A output current
* Up to 90% Efficiency
* Input Voltage Range: 8V 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.
SD45216SA
SD45216SATR
SD45216SAG
SD45216SAGTR
SD45216JA
SD45216JATR
Package
SOP-8-225-1.27
SOP-8-225-1.27
SOP-8-225-1.27
SOP-8-225-1.27
ESOP-8-225-1.27
ESOP-8-225-1.27
Marking
45216SA
45216SA
5216SAG
5216SAG
45216JA
45216JA
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
Material
Pb free
Pb free
Halogen free
Halogen free
Pb free
Pb free
Packing
Tube
Tape&Reel
Tube
Tape&Reel
Tube
Tape&Reel
REV:1.0
2010.10.27
Page 1 of 8




Silan Microelectronics

SD45216SAGTR Datasheet Preview

SD45216SAGTR Datasheet

HIGH EFFICIENCY STEP-DOWN DC/DC CONVERTER

No Preview Available !

SD45216_Datasheet
Part No.
SD45216JAG
SD45216JAGTR
Package
ESOP-8-225-1.27
ESOP-8-225-1.27
Marking
5216JAG
5216JAG
Material
Halogen free
Halogen free
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
S
PWM
Comparator
Q
RR
COMP
2
Protection
Packing
Tube
Tape&Reel
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
Storage Temperature
Rating
+44
-1~+44
+3
+3
-0.6~+6
-0.6~+6
+10
-40 ~ + 85
-65 ~ +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
Input Voltage Range
Feedback Reference Voltage
Feedback Current
Symbol
VIN
VFB
IFB
Test condition
VIN pin voltage
VFB=0.81V
Min.
8
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:1.0
2010.10.27
Page 2 of 8


Part Number SD45216SAGTR
Description HIGH EFFICIENCY STEP-DOWN DC/DC CONVERTER
Maker Silan Microelectronics
Total Page 8 Pages
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