sc1116 Semtech Corporation, sc1116 Datasheet

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sc1116

Manufacturer Part Number
sc1116
Description
Sc1116 Linear Fet Controller For Ddr Supplies
Manufacturer
Semtech Corporation
Datasheet

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The SC1116 is a low cost controller for low power
linear DDR power supplies.
The SC1116 comes in a space saving SOT-23 6 pin
package.
The SC1116 provides a dual gate drive for the top serial
and bottom parallel MOSFETs with internal shoot through
protection.
The wide range of input voltages (3V to 15V) allows the
chip to work in many various applications.
The variable output voltage is programmable from the
outside with an input divider or an external reference.
Wide range of V
Revision: March 28, 2007
POWER MANAGEMENT
Description
Typical Application Circuit
Notes:
(1) Values used for optional compensation are 1K and 4.7nF typical.
(2) When using 3V as Vcc, use of low threshold FETs is a must.
VDDQ=2.5Vtyp
Vcc=3 to 15V
DDQ
, down to 0.5V
1k 0.5%
1k 0.5%
R1
R2
0 . 1 uF
0 . 1 uF
1
2
3
VCC
GND
REF
U1
SC1116
DRVH
DRVL
FB
1
6
5
4
Features
Applications
MOS FET N
Q1
User can select FETs to optimize system current
rating/dropout/cost
Low V
-40°C to +85°C operating temperature
External compensation capable for low ESR loads
Minimum external components
0.6 mA Quiescent current
Guaranteed no shoot through
SOT-23 6L small package. Fully WEEE and RoHS
compliant
DDR supplies
SCSI
Line termination
Source / Sink LDOs
1k
typ
4 . 7 nF
typ
DDQ
, 0.5V to 2.5V
1k
typ
4 . 7 nF
typ
MOS FET N
Q2
4 7uF
typ
Linear FET Controller
For DDR Supplies
VTT=1.25Vtyp
GND
SC1116
www.semtech.com

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sc1116 Summary of contents

Page 1

... DDR power supplies. The SC1116 comes in a space saving SOT-23 6 pin package. The SC1116 provides a dual gate drive for the top serial and bottom parallel MOSFETs with internal shoot through protection. The wide range of input voltages (3V to 15V) allows the chip to work in many various applications ...

Page 2

... SC1116 ...

Page 3

... SC1116 ...

Page 4

... V ref=1.25V .1uF 2007 Semtech Corp. The SC1116 controller offers a low cost solution for DDR termination voltage regulation by using external pass el- ements (MOSFETs). Having the flexibility of choosing the MOSFETs allows for optimization on the basis of cost/ size/performance of the specific application. ...

Page 5

... POWER MANAGEMENT Typical Characteristics Regulation Vtt vs. Vref @ Is/s=1A; Vcc=5V 2.0% 1.0% 0.0% -1.0% -2.0% -3.0% -4.0% -5.0% 0.2 0.3 0.4 0.5 0.6 0.7 0.8 Vref (Vddq/2), V Regulation Vtt vs. Vref @ Is/s=1A; Vcc=12V 2.0% 1.0% 0.0% -1.0% -2.0% -3.0% -4.0% -5.0% 0.2 0.3 0.4 0.5 0.6 0.7 0.8 Vref (Vddq/2), V 2007 Semtech Corp. Regulation Vtt vs. Vref @ Is/s=5A; Vcc=5V 2.0% 1.0% 0.0% -1.0% -2.0% -3.0% -4.0% -5.0% 0.2 0.3 0.9 1.0 1.1 1.2 1.3 Regulation Vtt vs. Vref @ Is/s=5A; Vcc=12V 2.0% 1.0% 0.0% -1.0% -2.0% -3.0% -4.0% -5.0% 0.2 0.3 0.9 1.0 1.1 1.2 1.3 5 SC1116 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 Vref (Vddq/2), V 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 Vref (Vddq/2), V www.semtech.com 1.2 1.3 1.2 1.3 ...

Page 6

... Typical Characteristics (Cont 4.4 4.3 4.2 4.1 4 3.9 3.8 3.7 3.6 2007 Semtech Corp. Max. Sourcing Current vs 2.5V DDQ V = 1.25V REF V = 1.237V TT 3.5 4 4.5 5 SUPPLY VOLTAGE Max. Sinking Current vs 2.5V DDQ V = 1.25V REF V = 1.263V TT 3 3.5 4 4.5 5 SUPPLY VOLTAGE SC1116 5.5 6 6.5 (V) 5.5 6 6.5 (V) www.semtech.com ...

Page 7

... Semtech Corp. Quie Current rature -25 - TEMPERATURE °C Quiescent Current vs 125 3.5 4 4.5 5 SUPPLY VOLTAGE SC1116 2.5V DDQ V = 1.25V REF V = 1.25V LOAD 80 95 110 125 V = 2.5V DDQ V = 1.25V REF V = 1.25V TT ...

Page 8

... 2.5V DDQ V = 1.25V REF I : STEP +2. 2.2A Slew Rate: 2.5 A/ 2.5V DDQ V = 1.25V REF I : STEP +1.25A to –1.25A Slew Rate: 2.5 A/uS 8 SC1116 2.5V DDQ V = 1.25V REF I : STEP +1.75A to –1.75A Slew Rate: 2.5 A/uS Time (50us/div 2.5V DDQ V = 1.25V REF I : STEP - 0.75A to + 0.75A Slew Rate: 2 ...

Page 9

... 2.5V DDQ V = 1.25V REF I : STEP - 0.53A to + 0.53A Slew Rate: 2.5 A/ 2.5V DDQ V = 1.25V REF I : STEP + 0.03A to + 2.25A Slew Rate: 2.5 A/uS 9 SC1116 2.5V DDQ V = 1.25V REF C = 47uF OUT ceramic I : STEP - 0. 0.53A Slew Rate: 2.5 A/uS Time (50us/div 2.5V DDQ V = 1.25V REF I : STEP + 0 ...

Page 10

... Values used for optional compensation are 1K and 4.7nF typical. (2) When using 3V as Vcc, use of low threshold FETs is a must. 2007 Semtech Corp. Q1 IR3714 U1 SC1116 1 6 VCC DRVH C2 0 GND REF DRVL 0.1 C4 4.7nF 10 SC1116 Top Layer VTT=1.25Vtyp C6 47uF GND Q2 IR3714 4.7nF www.semtech.com ...

Page 11

... DIM INCHES INCHES (.098 .055 .037 X X .024 .043 Z Z .141 Semtech Corporation Power Management Products Division 200 Flynn Road, Camarillo, CA 93012 11 SC1116 DIMENSIONS INCHES MILLIMETERS NOM MAX MIN NOM MAX - - .057 1.45 0. .006 0.00 0.15 .045 .051 .90 1.15 1. .020 0.25 0. ...

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