NCP3133A PDF даташит
Спецификация NCP3133A изготовлена «ON Semiconductor» и имеет функцию, называемую «3A Integrated Synchronous Buck Converter». |
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Детали детали
Номер произв | NCP3133A |
Описание | 3A Integrated Synchronous Buck Converter |
Производители | ON Semiconductor |
логотип |
13 Pages
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NCP3133A
3 A Integrated Synchronous
Buck Converter
NCP3133A is a fully integrated synchronous buck converter for
3.3 V and 5 V step−down applications. It can provide up to 3 A load
current. NCP3133A supports high efficiency, fast transient response
and provides power good indicator. The control scheme includes two
operation modes: FCCM and automatic CCM/DCM. In automatic
CCM/DCM mode, the controller can smoothly switch between CCM
and DCM, where converter runs at reduced switching frequency with
much higher efficiency. NCP3133A is available in 3 mm x 3 mm
QFN−16 pin package.
Features
• High Efficiency in both CCM and DCM
• High Operation Frequency at 1.1 MHz
• Support MLCC Output Capacitor
• Small Footprint, 3 mm x 3 mm, 16−pin QFN Package
• Up to 3 A Continuous Output Current
• 2.9 V to 5.5 V Wide Conversion Voltage Range
• Output Voltage Range from 0.6 V to 0.84 X Vin
• Internal 400 ms Soft−Start
• Automatic Power−Saving Mode
• Voltage Mode Control
• Support Pre-bias Start−up Functionality
• Output Discharge Operation
• Over−Temperature Protection
• Built−in Over−Voltage, Under−Voltage and Over-Current Protection
• Power Good Indicator
• This is a Pb−Free Device
Applications
• 5 V Step Down Rail
• 3.3 V Step Down Rail
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1
QFN16 3 x 3, 0.5P
CASE 485DA
SUGGESTED PIN ARRANGEMENT
PGND PGND VIN VIN
16 15 14 13
EN 1
12 VDD
NC 2
PGD 3
NCP3133A
11 AGND
10 FB
VBST 4
9 COMP
5678
SW SW SW PS
MARKING DIAGRAM
3133A
ALYWG
G
3133A
A
L
Y
W
G
= Specific Device Code
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
(*Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering, marking and shipping information in the
package dimensions section on page 12 of this data sheet.
© Semiconductor Components Industries, LLC, 2014
September, 2014 − Rev. 1
1
Publication Order Number:
NCP3133A/D
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NC OSC
PS
EN
COMP
Ramp
SS
VREF
FB
+
+ E/A
−
PGD
NCP3133A
VIN
UVLO
Control Logic
&
PWM Logic
DRVH
Power Good,
UVP, OVP, UVLO,
Overtemperature
and Vout discharge
DRVL
OCP
UVLO
VBST
SW
PGND
VDD
AGND
Figure 1. Block Diagram
Table 1. PIN DESCRIPTION
Pin No.
Symbol
Description
1 EN Logic control to enabling the switcher. Internally pulled up to VDD with a 1.35 MW resistor
2 NC Not connected
3
PGD
Open drain power good output
4
VBST
Gate drive voltage for high side FET. Connect capacitor from this pin to SW
5, 6, 7
SW Switch node between high−side MOSFET and low−side MOSFET
8 PS Mode configuration pin (with 10 mA current):
Pulled high or floating (internally pulled high): Forced Continuous Conduction Mode
Connect with resistor equal to or lower than (≤)174 kW to GND: Automatic CCM/DCM
9 COMP Output of the error amplifier
10 FB Feedback pin. Connect to resistor divider to set up the desired output voltage
11
AGND
Analog ground
12
VDD
Power supply input for control circuitry
13, 14
VIN Power input for power conversion and gate driver supply
15, 16
PGND
Power ground
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2
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NCP3133A
Vin = 2.9 V X 5.5 V
L1
C5
EN
C6
C8
R5
R6
13
VIN
12 VDD
14
VIN
11 AGND
567
SW SW SW
VBST 4
2 NC
NCP3133A
PGD 3
1 EN
FB 10
8 PS
COMP 9
PGND PGND
15 16
C4
Vin
R7
C7 C9
PGD
R3 C1
C2 R4
R1
R2
C3
Vin = 2.9 V X 5.5 V
C5 C6
VDD = 3.3 V
C8
EN
R5
Figure 2. NCP3133A Single Voltage Rail for VIN and VDD
L1
13
VIN
12 VDD
14
VIN
11 AGND
567
SW SW SW
VBST 4
2 NC
NCP3133A
PGD 3
1 EN
FB 10
8 PS
COMP 9
PGND PGND
15 16
C4
Vin
R7
C7 C9
PGD
R3 C1
C2 R4
R1
R2
C3
Figure 3. NCP3133A Dual Voltage Rail for VIN and VDD
Vout
Vout
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Номер в каталоге | Описание | Производители |
NCP3133A | 3A Integrated Synchronous Buck Converter | ON Semiconductor |
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