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Details, datasheet, quote on part number:NCP5425DBR2
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Datasheet text preview:
NCP5425 Dual Synchronous Buck Controller
The NCP5425 is a highly flexible dual buck controller with internal gate drivers that can be used with two input power supplies and one or two outputs in multiple configurations. The part contains all the circuitry required for two independent synchronous dual NFET buck regulators utilizing a feed forward voltage mode control method. The NCP5425 can run from a single supply ranging from 4.6 to 12 volts and support a single two phase or dual single phase outputs. When used as a dual output controller, the second output tracks voltage transients from the first. Power blanking for low noise applications is supported as well as independent cycle-by-cycle current limiting. The part is available in a 20 pin TSSOP package allowing the designer to minimize PCB area.
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TSSOP-20 DB SUFFIX CASE 948E 1
· Operation Over 4.6 to 13.2 Volts · Dual Synchronous Buck Design · Configurable as a Single Two Phase Output or Two Single Phase · Programmable Power Sharing and Budgeting from Two Independent · · · · · · · · · · · · ·
Supplies 0.8 Volt "1% Reference for Low Voltage Outputs 1.5 A Peak Power Drive Switch Blanking for Noise Sensitive Applications through use of ROSC Pin Programmable Frequency, 150 kHz to 750 kHz Operation Programmable Soft Start Cycle-by-Cycle Overcurrent Protection Independent Programmable Current Limits 100% Duty Cycle for Fast Transient Response Internal Slope Compensation Out-of-Phase Synchronization between the Controllers Input Undervoltage Lockout On/Off Enable through use of the COMP Pins Power Supply Sequencing Outputs
PIN CONNECTIONS AND MARKING DIAGRAM
1 GATEH1 GATEL1 GND BST NC NC IS+1 IS-1 VFB1 COMP1 A WL Y WW 20 GATEH2 GATEL2 VCC ROSC MODE IS-2 IS+2 VREF2 VFB2 COMP2
NCP 5425 AWLYWW
= Assembly Location = Wafer Lot = Year = Work Week
ORDERING INFORMATION
Device NCP5425DB NCP5425DBR2 Package TSSOP-20 TSSOP-20 Shipping 61 Units/Rail 2500 Units/Reel
Applications
· DDR Memory Power · Graphics Cards
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.
© Semiconductor Components Industries, LLC, 2004
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September, 2004 - Rev. 5
Publication Order Number: NCP5425/D
NCP5425
12 V
3.3 V + C1 220 µF + C12 220 mF 5V
C6 C10 0.1 mF 1.5 V/ 10 A R1 4k R2 4k L2 1.3 mH + C3 680 mF1 NTD60N02R Q3 1 1 mF 18 4 C11 1 mF NTD60N02R 20 Q1 NTD110N02RT4 GATE(L)1 NCP5425 IS+1 GATE(L)2 IS+2 7 19 14 R11 4K C9 0.1 mF R9 0.4 k R7 5k Q2 L1 1.3 mH + C14 680 mF2 1.8 V/ 5A
VCC
GATE(H)1
GATE(H)2
NTD110N02RT4 Q4 2
BST IS-2 15 VREF2 13
R3 0.4 k C7 0.1 mF
8 10
IS-1 COMP1
COMP2
11 C8 0.1 mF
R5 3.5 k R4 15 k R6 4k
GND
VFB1
MODE
9
VFB2 12 ROSC 17
R12 30.9 k
Figure 1. Application Diagram, 3.3 V to 1.5 V/10 A and 1.8 V/5.0 A Converter
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16
3
R10 18 k
R8 4k
NCP5425
MAXIMUM RATINGS
Rating Operating Junction Temperature, TJ Storage Temperature Range, TJ ESD Susceptibility (Human Body Model) ESD Susceptibility (Machine Model) Moisture Sensitivity Level (MSL) Lead Temperature Soldering: Reflow: (Note 1) Value 150 -65 to 150 2.0 200 1 260 peak °C Unit °C °C kV V
Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected. 1. 60 to 150 seconds maximum above 183°C, 260°C peak.
MAXIMUM RATINGS
Pin Symbol VCC COMP1, COMP2 Pin Name IC Power Input VMAX 16 V VMIN -0.3 V ISOURCE N/A ISINK 2.0 A Peak 200 mA DC 1.0 mA
Compensation Capacitor for Channel 1 or 2 Voltage Feedback Input for Channel 1 or 2 Oscillator Resistor High-Side FET Driver for Channel 1 or 2 Low-Side FET Driver for Channel 1 or 2 Positive Current Sense for Channel 1 or 2 Negative Current Sense for Channel 1 or 2 Ground
4.0 V
-0.3 V
1.0 mA
VFB1, VFB2, VREF2 ROSC GATE(H)1, GATE(H)2 GATE(L)1, GATE(L)2 IS+1, IS+2
6.0 V
-0.3 V
1.0 mA
1.0 mA
5.0 V 20 V
-0.3 V -0.3 V
1.0 mA 2.0 A Peak 200 mA DC 2.0 A Peak 200 mA DC 1.0 mA
1.0 mA 2.0 A Peak 200 mA DC 2.0 A Peak 200 mA DC 1.0 mA
16 V
-0.3 V
6.0 V
-0.3 V
IS-1, IS-2
6.0 V
-0.3 V
1.0 mA
1.0 mA
GND
100 mV
0V
2.0 A Peak 200 mA DC N/A
N/A
BST
Power Input for GATE(H)1 GATE(H)2 Dual or Single Output Select
20 V
-0.3 V
2.0 A Peak 200 mA DC N/A
MODE
3.5 V
-0.3 V
N/A
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