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.
http://onsemi.com
MARKING
DIAGRAM
1
NCP5201
1
AWLYYWW
18−LEAD QFN, 5 x 6 mm
MN SUFFIX
Features
CASE 505
• Incorporates VDDQ, VTT Regulators
• Internal Switching Standby Regulator for VDDQ
• All External Power MOSFETs Are N−Channel
• Adjustable VDDQ
NCP5201= Specific Device Code
A
= Assembly Location
= Wafer Lot
WL
YY
WW
= Year
• VTT Tracks VDDQ/2
= Work Week
• Fixed Switching Frequency of 250 kHz for VDDQ in Normal Mode
• Doubled Switching Frequency (500 kHz) for Standby Mode
• Soft−Start Protection for VDDQ
PIN CONNECTIONS
• Undervoltage Monitor
• Short−Circuit Protection for Both VDDQ and VTT Outputs
• Housed in a space saving 5 × 6 QFN−18
FBDDQ
FBVTT
PGND
VSTBY
VTT
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
SS
COMP
VCC
TGDDQ
BGDDQ
SDDQ
AGND
S3_EN
PWRGD
Typical Applications
• DDR Termination Voltage
• Active Termination Busses (SSTL−2, SSTL−3)
VTT
OCDDQ
VDDQ
NC
NOTE: Pin 19 is the thermal pad on the bottom of
the device.
ORDERING INFORMATION
†
Device
Package
Shipping
NCP5201MN
18−LeadQFN*
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
Publication Order Number:
September, 2004 − Rev. 9
NCP5201/D