NCP5030-D| Datasheet

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NCP5030 Buck-Boost Converter to Drive a Single LED from 1 Li-Ion or 3 Alkaline Batteries
The NCP5030 is a fixed frequency PWM buck-boost converter optimized for constant current applications such as driving high-powered white LED. The buck-boost is implemented in an H-bridge topology and has an adaptive architecture where it operates in one of three modes: boost, buck-boost, or buck depending on the input and output voltage condition. This device has been designed with high-efficiency for use in portable applications and is capable of driving in DC up to 900 mA into a high power LED for flashlight / torch applications. To protect the device cycle-by-cycle current limiting and a thermal shutdown circuit have been incorporated as well as output over-voltage protection. The 700 kHz switching frequency allows the use of a low value 4.7 mH and ceramic capacitors. The NCP5030 is housed in a low profile space efficient 3x4 mm thermally enhanced WDFN.
Features http://onsemi.com
12

MARKING DIAGRAM
1

1 WDFN12 3x4 MT SUFFIX CASE 506AY

5030 ALYWG G

Efficiency: 87% at 500 mA and 3.3 V VIN Internal Synchronous Rectifier, No Schottky Diodes Adjustable Switching Limit Current to Optimize inductor size 0.3 mA Shut-down Control with "True-Cut off" Input Voltage Range from 2.7 V to 5.5 V 200 mV Feedback Voltage Output Over-voltage and Thermal Shut Down Protection

5030 = Specific Device Code A = Assembly Location L = Wafer Lot Y = Year W = Work Week G = Pb-Free Package (Note: Microdot may be in either location)

PIN CONNECTIONS
FB COMP CTRL PVIN 1 2 3 13 4 5 6 (Top View) D1 Exposed pad (Pin 13) is PGND must be soldered to PCB GND plane 12 11 10 9 8 7 PCA AGND VIN VS VOUT LX2

Typical Applications

Portable Flashlight / Torch Lights
Vin 1 Cell Li-Ion 2.7 to 5.5 39 k R1 ENABLE AGND CTRL PCA COMP FB PGND C2 10 mF Cin 1 mF VIN 4.7 mH L1

LX1 LX1

Cin LX1 LX1 PVIN

LX2

C3 22 mF VS Cout

VOUT

NCP5030

ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 13 of this data sheet.

L1: TDK RLF7030T-4R7M3R4 C1: 1 mF 6.3 V X5R C2: 10 mF 3.6 V 0805 TDK: C2012X5R0J106MT C4 C3: 22 mF 6.3 V X5R 22 pF TDK: C2012X5R0J226MTJ

R2 100 k C5 330 pF

R3 220 m RSENSE

Figure 1. Typical Application Circuit

Semiconductor Components Industries, LLC, 2006

1

December, 2006 - Rev. 0

Publication Order Number: NCP5030/D

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NCP5030-D DATASHEET