NCP5201 Datasheet, PDF (1/10 Pages) ON Semiconductor – Dual Output DDR Power Controller

NCP5201
Dual Output
DDR Power Controller
The NCP5201 Dual DDR Power Controller is specifically
designed as a total power solution for a high current DDR memory
system. This IC combines the efficiency of a PWM controller for the
VDDQ supply with the simplicity of a linear regulator for the VTT
memory termination voltage. The secondary regulator (VTT) is
designed to automatically track at half the primary regulator voltage
(VDDQ). An internal power good voltage monitor tracks both
VDDQ and VTT outputs and notifies the user in the event of a fault
on either output. Protective features include soft−start circuitry and
undervoltage monitoring of VCC and VSTBY. The IC is packaged in
a 5 × 6 QFN−18.
Features
• Incorporates VDDQ, VTT Regulators
• Internal Switching Standby Regulator for VDDQ
• All External Power MOSFETs Are N−Channel
• Adjustable VDDQ
• VTT Tracks VDDQ/2
• Fixed Switching Frequency of 250 kHz for VDDQ in Normal Mode
• Doubled Switching Frequency (500 kHz) for Standby Mode
• Soft−Start Protection for VDDQ
• Undervoltage Monitor
• Short−Circuit Protection for Both VDDQ and VTT Outputs
• Housed in a space saving 5 × 6 QFN−18
Typical Applications
• DDR Termination Voltage
• Active Termination Busses (SSTL−2, SSTL−3)
http://onsemi.com
MARKING
DIAGRAM
1
1
18−LEAD QFN, 5 x 6 mm
MN SUFFIX
CASE 505
NCP5201
AWLYYWW
NCP5201 = Specific Device Code
A
= Assembly Location
WL
= Wafer Lot
YY
= Year
WW = Work Week
PIN CONNECTIONS
FBDDQ 1
FBVTT 2
PGND 3
VSTBY 4
VTT 5
VTT 6
OCDDQ 7
VDDQ 8
NC 9
18 SS
17 COMP
16 VCC
15 TGDDQ
14 BGDDQ
13 SDDQ
12 AGND
11 S3_EN
10 PWRGD
NOTE: Pin 19 is the thermal pad on the bottom of
the device.
ORDERING INFORMATION
Device
Package
Shipping^†
NCP5201MN 18−Lead QFN* 61 Units/Rail
NCP5201MNR2 18−Lead QFN* 2500 Units/Reel
*5 × 6 mm
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2004
1
September, 2004 − Rev. 9
Publication Order Number:
NCP5201/D