SC2614MLTR Semtech, SC2614MLTR Datasheet

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SC2614MLTR

Manufacturer Part Number
SC2614MLTR
Description
Manufacturer
Semtech
Datasheet

Specifications of SC2614MLTR

Operating Temperature (max)
70C
Operating Temperature (min)
0C
Pin Count
18
Mounting
Surface Mount
Package Type
MLP
Case Length
6mm
Screening Level
Commercial
Lead Free Status / Rohs Status
Not Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
SC2614MLTR
Manufacturer:
SC
Quantity:
20 000
Company:
Part Number:
SC2614MLTR
Quantity:
800
The SC2614 is a fully integrated DDR power solution pro-
viding power for the VDDQ and the VTT rails. The SC2614
also completely adheres to the ACPI sleep state power
requirements. A synchronous buck controller provides
the high current of the VDDQ at high efficiency, while a
linear sink/source regulator provides the termination
voltage with 2 Amp Source/Sink capability . This approach
makes the best trade-off between cost and performance.
Additional logic and UVLOs complete the functionality of
this single chip DDR power solution in compliance with
S3 and S5 motherboard signals. A BF_CUT output sig-
nal prevents Back Feeding Input Rail during S3 while a
PGOOD output signals correct voltage Rails.
The SC2614 is capable of sourcing up to 20A at the
switcher output, and 2A at the VTT output. The MLP
package provides excellent thermal impedance while
keeping small footprint. VDDQ current limit as well as 3
independent thermal shutdown circuits assure safe
operation under all fault conditions.
POWER MANAGEMENT
Description
Revision 6, July 2004
Typical Application Circuit
5V STBY
BF_CUT
PWRGD
12V
5V
100uF
0.1uF
0.1uF
0.1uF
10k
10k
16
11
10
18
17
12
4
3
2
VTTSNS
12VCC
5VSBY
BF_CUT
PWRGD
SS/EN
COMP
AGND
LGND
THPAD
10k
19
VDDQSTBY
SC2614
VDDQIN
PGND
5VCC
VTT
VTT
TG
BG
FB
1
9
15
14
13
7
8
1
6
5
Features
Applications
Uses Latched BF_Cut from Glue Chip to se-
quence the three regulators
High efficiency (90%) switcher for VDDQ supplies
20 Amps
Single chip solution complies fully with ACPI power
sequencing Specifications
2 Amp VTT Source/Sink Capability
High current gate drives
Internal S3 state LDO for VDDQ
UVLO on 5V and 12V
Independent Thermal Shutdown for VDDQ and VTT
Fast transient response
18 pin MLP package
Power Solution for DDR memory per Intel
High speed data line termination
motherboard specification
Cin
Complete DDR Power Solution
With BF_CUT and PGOOD
1uF
0.1uF
L
VTT
Cout
0.1uF
www.semtech.com
SC2614
®
VDDQ

Related parts for SC2614MLTR

SC2614MLTR Summary of contents

Page 1

... High speed data line termination 10k 10k Cin 10k 16 9 12VCC 5VCC 4 15 5VSBY BF_CUT PWRGD PGND 18 7 SS/EN VDDQSTBY 17 8 COMP VDDQIN 12 1 AGND LGND VTT 2 5 VTTSNS VTT THPAD 19 SC2614 1 SC2614 With BF_CUT and PGOOD ® 1uF L 0.1uF Cout VTT 0.1uF www.semtech.com VDDQ ...

Page 2

... Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not implied See Mounting Considerations. Electrical Characteristics Unless specified 25°C, 12VCC = 12V, 5VCC = 5V, 5VSBY = 5V © 2004 Semtech Corp θ θ STG SC2614 www.semtech.com ...

Page 3

... POWER MANAGEMENT Electrical Characteristics (Cont.) Unless specified 25°C, 12VCC = 12V, 5VCC = 5V, 5VSBY = 5V © 2004 Semtech Corp ∆ ∆ ∆ ∆ SC2614 www.semtech.com ...

Page 4

... VDDQIN 8 11 5VCC 9 10 (18 Pin MLP) Note: Pin19 is the thermal Pad on the bottom of the device Pin Descriptions © 2004 Semtech Corp. Ordering Information S SS/EN Notes: COMP (1) Only available in tape and reel packaging. A reel 12VCC contains 3000 devices PGND AGND BF_CUT PWRGD ...

Page 5

... POWER MANAGEMENT Timing Diagram © 2004 Semtech Corp. 5 SC2614 www.semtech.com ...

Page 6

... POWER MANAGEMENT Block Diagram © 2004 Semtech Corp. 6 SC2614 www.semtech.com ...

Page 7

... Io (A) VDDQ Load Regulation 1.0% 0.5% 0.0% -0.5% -1.0% -2.5 -2.0 -1.5 -1.0 -0.5 0.0 Io (A) VTT Load Regulation, Source and Sink © 2004 Semtech Corp. 100% 80% 60% 40% 20% 0% 1.2 100E+3 1E+6 VCOMP vs Duty Cycle 8.0 10.0 12.0 0.5 1.0 1 ...

Page 8

... PWR GD/S5 18 SS/EN J12 17 COMP SS/EN 12 AGND R6 TBD 3 LGND C10 2 VTTSN C11 TBD C12 0.1uF TBD J14 GND J19 ATX M/B MOLEX 39-29-9202 Figure 2: Evaluation Board Schematic © 2004 Semtech Corp 12V R2 10k 1500uF 1500uF 1500uF 1uF R3 2.2 9 5VCC 2 SGND 7 VDDQSBY ...

Page 9

... POWER MANAGEMENT Applications Information Description The Semtech SC2614 DDR power supply controller is the latest and most complete, three in one, switching and linear regulator, providing the necessary functions to comply with S3 and S5 sleep state signals generated by the Desktop Computer Motherboards. The SC2614 BF_CUT ...

Page 10

... © 2004 Semtech Corp. The compensation network includes a resistor and a ca- pacitor in series, which terminates from the output of the error amplifier to the ground. This device uses voltage mode control with input voltage feed forward. The peak-to-peak ramp voltage is propor- tional to the input voltage, which results in an excellent performance to reject input voltage variation ...

Page 11

... Mathcad. The phase margin can then be checked using the Bode plot. Usually, this design procedure ensures a healthy phase margin. An example is given below to demonstrate the proce- dure introduced above. The parameters of the power supply are given as: © 2004 Semtech Corp. ⎛ ⎞ ⎛ ⎞ F ...

Page 12

... POWER MANAGEMENT 100 50 mag phase 135 180 10 © 2004 Semtech Corp. Loop Gain Mag (dB 100 F i Loop Gain Phase (Degree 100 F i Fig. 2. Bode plot of the loop 12 SC2614 www.semtech.com ...

Page 13

... PC board area for effective heatsinking. The copper area immdiately surrounding the thermal pad connection must not be interupted by routing traces. © 2004 Semtech Corp. Exposed Pad Stencil Design It is good practice to minimize the presence of voids within the exposed pad inter-connection. Total elimination is ...

Page 14

... POWER MANAGEMENT Outline Drawing - MLP-18 TERMINAL 1 TOP VIEW IDENTIFIER TERMINAL 1 BOTTOM VIEW 1 CONTROLLING DIMENSIONS: MILLIMETERS © 2004 Semtech Corp. 14 SC2614 www.semtech.com ...

Page 15

... POWER MANAGEMENT Land Pattern - MLP-18 Contact Information © 2004 Semtech Corp. Semtech Corporation Power Management Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 15 SC2614 www.semtech.com ...

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