OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

NCP5211ADR2

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
Semiconductor Components Industries, LLC, 2003
December, 2003 − Rev. 3
1 Publication Order Number:
NCP5211A/D
NCP5211A
Low Voltage Synchronous
Buck Controller
The NCP5211A is a low voltage synchronous buck controller. It
contains all required circuitry for a synchronous buck converter using
external N−Channel MOSFETs. High current internal gate drivers are
capable of driving low R
DS(on)
NFETs for better efficiency. The
NCP5211A is in a 14 pin package to minimize PCB area.
The NCP5211A provides overcurrent protection, undervoltage
lockout, soft start and built in adaptive nonoverlap. The NCP5211A is
adjustable over a frequency range of 150 kHz to 750 kHz. This gives
the designer more flexibility to make efficiency and component size
compromises. The NCP5211A will operate on a single supply or a
separate boost supply.
Features
• Switching Regulator Controller
− N−Channel Synchronous Buck Design
− 1.0 Amp Gate Drive Capability
− 200 ns Transient Response
− Programmable Operating Frequency of 150 kHz−750 kHz
− 0.8 V 1% Internal Reference
− Lossless Inductor Sensing Overcurrent Protection
− Cycle−by−Cycle Short Circuit Protection
− Programmable Soft Start
− 40 ns GATE Rise and Fall Times (3.3 nF Load)
− 70 ns Adaptive FET Nonoverlap Time
− Differential Remote Sense Capability
• System Power Management
− Operation with a Conversion Rail of 5.0 V or 12 V
− Undervoltage Lockout
− On/Off Control Through Use of the COMP Pin
− Max Duty Cycle Clamped to 70% for Forward Converter Control
Applications
• Set Top Devices
• Forward Converters
• Buck Converters
• Point of Load Regulation
MARKING
DIAGRAM
B = Assembly Location
WL = Wafer Lot
Y = Year
WW = Work Week
1
GATE(L)
PGND
SGND
V
FB
GATE(H)
IS+
IS−
R
OSC
V
CC
PIN CONNECTIONS
V
C
BST
LGND
V
FFB
COMP
SOIC−14
D SUFFIX
CASE 751A
1
14
NCP5211A
BWLYWW
http://onsemi.com
Device Package Shipping†
ORDERING INFORMATION
NCP5211AD SO−14 55 Units/Rail
NCP5211ADR2 SO−14 2500 Tape & Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
NCP5211A
http://onsemi.com
2
COMP
V
FFB
V
FB
GATE(H)
GATE(L)
V
C
V
CC
PGND
IS−
R
OSC
NCP5211A
2.5 V/8 A
51 k
0.1 µF
LGND
100 µF/10 V × 3
0.1 µF
SENSE+
1.0 k
1.0%
2.9 µH
5.0 V
IS+
SENSE−
+
+
100 µF/10 V × 2
SGND
1.0%
0.1 µF
0.1 µF
10
BST
4.7 k
Figure 1. Application Diagram, 5.0 V to 2.5 V/8 A Converter with Differential Remote Sense
10
2.15 k
+V
OUT
−V
OUT
Return
680 pF
NTMS7N03
NTMS7N03
NOTE: Resistance in Ohms
MAXIMUM RATINGS*
Rating Value Unit
Operating Junction Temperature, T
J
150 °C
Lead Temperature Soldering: Reflow: (SMD styles only) (Note 1) 230 peak °C
Storage Temperature Range, T
S
−65 to +150 °C
Package Thermal Resistance:
Junction−to−Case, R
θ
JC
Junction−to−Ambient, R
θ
JA
30
125
°C/W
°C/W
ESD Capability − All pins except R
OSC
(Human Body Model)
(Machine Model)
2.0
200
kV
V
ESD Capability − R
OSC
Pin Only (Human Body Model)
(Machine Model)
500
150
V
V
JEDEC Moisture Sensitivity Level 1 −
1. 60 second maximum above 183°C.
*The maximum package power dissipation must be observed by not exceeding 150°C T
J
.
NCP5211A
http://onsemi.com
3
MAXIMUM RATINGS (Voltage with respect to Logic Ground)
Pin Name Pin Symbol V
MAX
V
MIN
I
SOURCE
I
SINK
IC Power Input V
CC
16 V −0.3 V N/A 50 mA DC
Power input for the low side driver V
C
16 V −0.3 V N/A 1.5 A Peak, 200 mA DC
Power Supply input for the high
side driver
BST 20 V −0.3 V N/A 1.5 A Peak, 200 mA DC
Compensation Capacitor COMP 6.0 V −0.3 V 1.0 mA 1.0 mA
Voltage Feedback Input V
FB
6.0 V −0.3 V 1.0 mA 1.0 mA
Oscillator Resistor R
OSC
6.0 V −0.3 V 1.0 mA 1.0 mA
Fast Feedback Input V
FFB
6.0 V −0.3 V 1.0 mA 1.0 mA
High−Side FET Driver GATE(H) 20 V −0.3 V
−2.0 V for 50 ns
1.5 A Peak
200 mA DC
1.5 A Peak
200 mA DC
Low−Side FET Driver GATE(L) 16 V −0.3 V
−2.0 V for 50 ns
1.5 A Peak
200 mA DC
1.5 A Peak
200 mA DC
Positive Current Sense IS+ 6.0 V −0.3 V 1.0 mA 1.0 mA
Negative Current Sense IS− 6.0 V −0.3 V 1.0 mA 1.0 mA
Power Ground PGND 0.2 V −0.2 V 1.5 A Peak, 200 mA DC N/A
Logic Ground LGND N/A N/A 100 mA N/A
Sense Ground SGND 0.2 V −0.2 V 1.0 mA 1.0 mA
ELECTRICAL CHARACTERISTICS (−40°C < T
A
< 85°C; −40°C < T
J
< 125°C; 4.5 V < V
CC
, V
C
< 14 V;
7.0 V < BST < 20 V; C
GATE(H)
= C
GATE(L)
= 3.3 nF; R
OSC
= 51 k; C
COMP
= 0.1 µF, unless otherwise specified.)
Characteristic
Test Conditions Min Typ Max Unit
Error Amplifier
V
FB
Bias Current V
FB
= 0 V − 0.1 1.0 µA
COMP Source Current V
FB
= 0.6 V 15 30 60 µA
COMP SINK Current V
FB
= 1.2 V 15 30 60 µA
Open Loop Gain (Note 2) − 98 − dB
Unity Gain Bandwidth C = 0.1 µF, (Note 2) − 50 − kHz
PSRR @ 1.0 kHz (Note 2) − 70 − dB
Output Transconductance (Note 2) − 32 − mmho
Output Impedance (Note 2) − 2.5 − MΩ
Reference Voltage −0.1 V < SGND < 0.1 V,
COMP = V
FB
Measure
−40 ≤ T
J
≤ 125°C 0.788 0.8 0.812
V
COMP = V
FB
, Measure
V
FB
to SGND
25 ≤ T
J
≤ 110°C 0.792 0.8 0.808
COMP Max Voltage V
FB
= 0.6 V 2.5 3.0 − V
COMP Min Voltage V
FB
= 1.2 V − 0.1 0.2 V
COMP Discharge Current in UVLO − 500 750 1000 µA
COMP Threshold to Start Gate Drive − 0.2 0.4 0.6 V
2. Guaranteed by design. Not tested in production.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

NCP5211ADR2

Mfr. #:
Buy NCP5211ADR2
Manufacturer:
ON Semiconductor
Description:
IC REG CTRLR BUCK 14SOIC
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet