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PDF NCP5252 Data sheet ( Hoja de datos )
| Número de pieza | NCP5252 | |
| Descripción | 2A Integrated Sync Buck Converter | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de NCP5252 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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NCP5252
2.0 A, 1.0 MHz Integrated
Synchronous Buck
Regulator with Light Load
Efficiency
NCP5252 is a synchronous buck regulator with integrated high-side
and low-side MOSFETs. The device is capable of operating from a 5 V
or 12 V supply and can output a voltage down to 0.6 V. The switching
frequency is adjustable from 333 kHz up to 1.0 MHz and has the
ability to provide skip mode for light load efficiency. NCP5252
protection features include Under Voltage Lock Out (UVLO), Over
Voltage Protection (OVP), Cycle-by-Cycle Current Protection (OCP)
and Thermal Shutdown. The parts are packaged in a 3x3mm QFN-16.
Features
• 1% Accuracy 0.6 V Reference
• VCC Voltage 4.5 V to 13.2 V
• Adjustable Output Voltage Range: 0.6 V to 5.0 V Vout
• Transient Response Enhancement (TRE) Feature.
• Lossless Low Side Sense Current Control
• Input Voltage Feed Forward Control
• Internal Digital Soft−Start
• Integrated Output Discharge (Soft−Stop)
• Cycle−by−Cycle Current Limit
• PGOOD Indication
• Overvoltage and Undervoltage Protection
• Thermal Shutdown Protection
• Power Saving Mode at Light Load
www.Dat•aSIhneteetg4Ura.tceodmBoost Diode
• QFN−16 (3 mm x 3 mm)
• These Devices are Pb−Free and are RoHS Compliant
Typical Applications
• Desktop Application
• System Power
• XDSL, Modems, DC−DC Modules
• Set Top Box
• HD Driver
• LED Driver, DVD Recorders
http://onsemi.com
1
QFN16
CASE 485G
MARKING
DIAGRAM
16
1
N5252
ALYWG
G
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
16 15 14 13
VCC 1
BST 2
PGOOD 3
EN/SKIP 4
NCP5252
12 PGND
11 PGND
10 V5
9 FREQ_SET
5678
QFN16
(Top View)
ORDERING INFORMATION
Device
Package
Shipping†
NCP5252MNTXG QFN16 3000 / Tape & Reel
(Pb−Free)
†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, 2010
January, 2010 − Rev. 0
1
Publication Order Number:
NCP5252/D
1 page  
NCP5252
ELECTRICAL CHARACTERISTICS (VCC = 4.5 to 13.2 V, TA = −40°C to 85°C, unless other noted)
Characteristics
Symbol
Test Conditions
Min
SUPPLY VOLTAGE
Input Voltage
POR Threshold for Internal Reset
Logic
VCC
VCC_POR
4.5
SUPPLY CURRENT
VCC Quiescent Supply Current
VCC Shutdown Current
BST Quiescent Supply Current
BST Shut Down Current
VCC Input Current
LDO REGULATOR
ICC_FPWM
IVCC_SD
IBST_FPWM
IBST_SD
IVCC
EN/SKIP = 5 V, VFB = 1 V (No switching),
VCC = 4.5 V to 13.2 V
EN/SKIP = 0 V
EN/SKIP = H, VFB = 1 V, VBST = 5 V
EN/SKIP = L, VFB = 1 V, VBST = 5 V
FREQ_SET = AGND. FREQ = 333 kHz
V5 Regulator Voltage
V5 Rise Threshold
V5 UVLO Hysteresis
V5 Loading
V5 Current Limit
Drop−out Voltage (VCC − V5)
POWER GOOD
V5
V5_th+
V5HYS
V5LOAD
ILIMIT_V5
VDR
VCC > 6 V, IV5 = 5 mA
Wake Up
4.85
4.1
300
Io = 5 mA, TA = 25°C, VCC = 4.5 V, FB = 1V
20
Power Good High Threshold
VPGH
PGOOD in from higher Vo
(PGOOD goes high)
100
Power Good High Hysteresis
VPGH_HYS
PGOOD high hysteresis
(PGOOD goes low)
Power Good Low Threshold
VPGL
PGOOD in from lower Vo
(PGOOD goes high)
75
Power Good Low Hysteresis
VPGL_HYS
PGOOD low hysteresis
(PGOOD goes low)
Power Good High Delay
Power Good Low Delay
Output Overvoltage Rising
www.DataTShhreeesht4oUld.com
Over voltage Fault Propagation
Delay
Td_PGH
Td_PGL
OVPth+
OVPTblk
OVPth+ = VPGH + VPGH_SYS
FB Forced 2% above trip threshold
105
Output Undervoltage Trip
Threshold
UVPth
UVPth = VPGL + VPGL_HYS
70
Output Undervoltage Protection
Blanking Time
UVPTblk
REFERENCE OUTPUT
Internal Reference Voltage
Output Voltage Accuracy (Note 1)
Line Regulation (Note 1)
OSCILLATOR
VREF
25°C
−40°C to 85°C
VIN = 12 V, Io = 0 A to 2 A
VIN = 5 to 12 V, IOUT = 500 mA
0.594
0.591
−1
Operation Frequency
FSW
FREQ_SET = V5
FREQ_SET = NC
FREQ_SET = AGND
900
450
300
INTERNAL SOFT−START
Soft−Start Time
tSS
1. Guaranteed by design, not tested in production.
2. Test mode disables the Ton/Toff min.
Digital Soft−Start (VOUT from 10% to 90%)
Typ
3.0
1.0
18
5.0
4.3
400
110
5
85
−5
150
1.5
115
1.5
80
8.0
0.6
0.6
0
0.1
1000
500
333
800
Max Unit
13.2 V
3.7 V
2.5 mA
10 mA
0.3 mA
10 mA
mA
5.15 V
4.45 V
500 mV
3.0 mA
mA
200 mV
120 %
%
95 %
%
ms
ms
125 %
ms
90 %
ms
0.606
0.609
+1
V
%
%/V
1100
550
366
kHz
kHz
kHz
ms
http://onsemi.com
5
5 Page 
NCP5252
(Vin = 12 V, L = 5 mH, COUT = 100 mF, Freq = 500 kHz)
Upper trace: Output dynamic voltage, 100 mV/div
Lower trace: Output current, 1 A/div
Time base : 50 ms/div
Figure 21. Load Transient Response for Vout =
1.2 V
(Vin = 5 V, L = 5 mH, COUT = 100 mF, Freq = 1 MHz)
Upper trace: Output dynamic voltage, 100 mV/div
Lower trace: Output current, 1 A/div
Time base : 50 ms/div
Figure 22. Load Transient Response for Vout =
1.2 V
www.DataSheet4U.com
(Vin = 12 V, L = 5 mH, COUT = 100 mF, Freq = 1 MHz)
Upper trace: Output dynamic voltage, 100 mV/div
Lower trace: Output current, 1 A/div
Time base : 50 ms/div
Figure 23. Load Transient Response for Vout =
3.3 V
(Vin = 5 V, L = 5 mH, COUT = 100 mF, Freq = 333 kHz)
Upper trace: Output dynamic voltage, 100 mV/div
Lower trace: Output current, 1 A/div
Time base : 50 ms/div
Figure 24. Load Transient Response for Vout =
3.3 V
http://onsemi.com
11
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| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet NCP5252.PDF ] | |
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