NCP51199 Datasheet PDF - ON Semiconductor

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NCP51199
ON Semiconductor

Part Number NCP51199
Description Termination Regulator
Page 7 Pages


NCP51199 datasheet pdf
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NCP51199, NCV51199
DDR 2-Amp Source / Sink
VTT Termination Regulator
The NCP/NCV51199 is a linear regulator designed to supply a
regulated VTT termination voltage for DDR−2 and DDR−3 memory
applications. The regulator is capable of actively sourcing and sinking
±2 A peak currents for DDR−2, and DDR−3 up to ±1.5 A while
regulating the VTT output voltage to within ±10 mV. The output
termination voltage is regulated to track VDDQ / 2 by two external
voltage divider resistors connected to the PVCC, GND, and VREF pins.
The NCP/NCV51199 incorporates a high−speed differential
amplifier to provide ultra−fast response to line and load transients.
Other features include source/sink current limiting, soft−start and
on−chip thermal shutdown protection.
Features
Supports DDR−2 VTT Termination to ±2 A, DDR−3 to ±1.5 A (peak)
Stable with 10 mF Ceramic Capacitance on VTT Output
Integrated Power MOSFETs
High Accuracy VTT Output at Full−Load
Fast Transient Response
Built−in Soft−Start
Shutdown for Standby or Suspend Mode
Integrated Thermal and Current−Limit Protection
NCV Prefix for Automotive and Other Applications Requiring
Unique Site and Control Change Requirements; AEC−Q100
Qualified and PPAP Capable
These Devices are Pb−Free and are RoHS Compliant
Typical Applications
SDRAM Termination Voltage for DDR−2 / DDR−3
Motherboard, Notebook, and VGA Card Memory Termination
Set Top Box, Digital TV, Printers
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MARKING
DIAGRAM
8
8
1
SOIC8−NB EP
PD SUFFIX
CASE 751BU
XXXXXX
ALYW
G
1
XXXXXX = Specific Device Code
A = Assembly Location
L = Wafer Lot
Y = Year
WW = Work Week
G = Pb−Free Package
PIN CONNECTION
1
PVCC
8
NC
GND
VREF
VTT
SOIC−8 EP
NC
VCC
NC
ORDERING INFORMATION
See detailed ordering, marking and shipping information in the
package dimensions section on page 6 of this data sheet.
© Semiconductor Components Industries, LLC, 2014
March, 2014 − Rev. 2
1
Publication Order Number:
NCP51199/D



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NCP51199, NCV51199
PVCC = 1.5 to 5.0 V*
R2
100k
C2
NCP51199
1
PVCC
2
GND
VCC 6
C3
5V
Enable
R1
100k
3
VREF
C1
4
VTT
VTT = 0.75 to 2.5 V*
C4
R3
C1 = 1 mF (Low ESR)
C2 = 470 mF (Low ESR)
C3 = 47 mF
*For DDR2: PVCC = 1.8 V, VTT = 0.9 V
DDR3: PVCC = 1.5 V, VTT = 0.75 V
C4 = 1000 mF + 10 mF (10 mF ceramic)
R3 = Optional VTT discharge resistor
N−ch MOSFET = Optional Enable / Disable
Figure 1. Application Diagram
PIN FUNCTION DESCRIPTION
Pin No.
Pin Name
Description
1
PVCC
Input voltage which supplies current to the output pin. CIN = 470 mF with low ESR.
2
GND
Common Ground
3
VREF
Buffered reference voltage input equal to ½ of VDDQ and active low shutdown pin. An external resistor
divider dividing down the PVCC voltage creates the regulated output voltage. Pulling the pin to ground
(0.15 V maximum) turns the device off.
4 VTT Regulator output voltage capable of sourcing and sinking current while regulating the output rail.
COUT = 1000 mF + 10 mF ceramic with low ESR.
5 NC True No Connect
6 VCC The VCC pin is a 5 V input pin that provides internal bias to the controller. PVCC should always be kept
lower or equal to VCC.
7 NC True No Connect
8 NC True No Connect
EP Thermal Pad Pad for thermal connection. The exposed pad must be connected to the ground plane using multiple
vias for maximum power dissipation performance.
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NCP51199, NCV51199
ABSOLUTE MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Input Supply Voltage Range (Vcc w PVCC) (Note 1)
PVCC,
VCC
−0.3 to 6
V
Output Voltage Range
Reference Input Range
Maximum Junction Temperature
Storage Temperature Range
VTT
VREF
TJ(max)
TSTG
−0.3 to 6
−0.3 to 6
125
−65 to 150
V
V
°C
°C
ESD Capability, Human Body Model (Note 2)
ESDHBM
2
kV
ESD Capability, Machine Model (Note 2)
ESDMM
150
V
Lead Temperature Soldering
Reflow (SMD Styles Only), Pb−Free Versions (Note 3)
TSLD
260 °C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. Refer to ELECTRICAL CHARACTERISTICS and APPLICATION INFORMATION for Safe Operating Area.
2. This device series incorporates ESD protection and is tested by the following methods:
ESD Human Body Model tested per AEC−Q100−002 (EIA/JESD22−A114)
ESD Machine Model tested per AEC−Q100−003 (EIA/JESD22−A115)
Latchup Current Maximum Rating: 150 mA per JEDEC standard: JESD78
3. For information, please refer to our Soldering and Mounting Techniques Reference Manual, SOLDERRM/D
THERMAL CHARACTERISTICS
Rating
Symbol
Thermal Characteristics, SO8−EP (Note 4)
Thermal Resistance, Junction−to−Air (Note 5)
Power Rating at 25°C Ambient = 1.19 W, derate 12 mW/°C
Thermal Reference, Junction−to−Lead2 (Note 5)
RqJA
RYJL
4. Refer to ELECTRICAL CHARACTERISTIS and APPLICATION INFORMATION for Safe Operating Area.
5. Values based on copper area of 645 mm2 (or 1 in2) of 1 oz copper thickness and FR4 PCB substrate.
Value
84
20
Unit
°C/W
OPERATING RANGES (Note 6)
Rating
Symbol
Min
Input Voltage
PVCC
1.5
Bias Supply Voltage
VCC 4.75
Ambient Temperature
TA −40
Junction Temperature
TJ −40
6. Refer to ELECTRICAL CHARACTERISTICS and APPLICATION INFORMATION for Safe Operating Area.
Max Unit
5.5 V
5.25 V
85 °C
125 °C
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NCP51199, NCV51199
ELECTRICAL CHARACTERISTICS
PVCC = 1.8 V / 1.5 V; VCC = 5 V; VREF = 0.9 V / 0.75 V; COUT = 10 mF (Ceramic); TA = +25°C, unless otherwise noted.
Parameter
Test Conditions
Symbol Min Typ
REGULATOR OUTPUT
Output Offset Voltage
Load Regulation
Iout = 0 A
VREF = 900 mV, Iout = ±1.8 A, PVCC = 1.8 V
VREF = 750 mV, Iout = ±1.4 A, PVCC = 1.5 V
VOS
Regload
−20
−10
INPUT AND STANDBY CURRENTS
Bias Supply Current
Standby Current
CURRENT LIMIT PROTECTION
Iout = 0 A
VREF < 0.2 V (Shutdown), RLOAD = 180W
IBIAS
ISTB
− 0.8
−1
Current Limit
SHUTDOWN THRESHOLDS
PVCC = 1.8 V, VREF = 0.9 V
PVCC = 1.5 V, VREF = 0.75 V
2.0 −
ILIM 1.5 −
Shutdown Threshold Voltage
THERMAL SHUTDOWN
Enable
Shutdown
VIH 0.6 −
VIL − −
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
VCC = 5 V
VCC = 5 V
TSD 160 168
TSH 35 35
Max
+20
+10
2.5
90
3.5
3.5
0.15
176
40
Unit
mV
mV
mA
mA
A
V
°C
°C
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