LM2794TLX

LM2794TLX, fractional CMOS charge-pump, BGA, 6.2V, National Semiconductor

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Price:: US $0.27~0.30 / piece [Get Latest Price]

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	US $0.27~0.30

PartNumber:: LM2794TLX

Brand:: National Semiconductor - NS | Pack: BGA | D/C: 10+

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Products Upload time: 2012-11-15

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Part Number:LM2794TLX
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Product Summary

The LM2794TLX is a fractional CMOS charge-pump that provides four regulated current sources. It accepts an input voltage range from 2.7V to 5.5V and maintains a constant current determined by an external sense resistor. The LM2794TLX delivers up to 80mA of load current to accommodate four White LEDs. The switching frequency is 325kHz. (min.) to keep the conducted noise spectrum away from sensitive frequencies within portable RF devices. The applications of the LM2794TLX include White LED Display Backlights, White LED Keypad Backlights, 1-Cell Li-Ion battery-operated equipment including, PDAs, hand-held PCs, cellular phones.

Parametrics

LM2794TLX absolute maximum ratings: (1)VIN: -0.5 to 6.2V max; (2)SD: -0.5 to (VIN+0.3V) w/6.2V max; (3)BRGT: -0.5 to (VIN+0.3V) w/6.2V max; (4)Continuous Power Dissipation, (Note 2): Internally Limited; TJMAX: 135℃; (5)θJA (Notes 2, 3): 125℃/W; (6)Storge Temperature: -65℃ to +150℃; (7)Lead Temp. (Soldering, 5 sec.): 260℃; (8)ESD Rating, Human Body Model: 2kV; Machine Model: 200V.

Features

LM2794TLX features: (1)Regulated current sources with ±0.5% matching between any two outputs; (2)High efficiency 3/2 boost function; (3)Drives one, two, three or four white LEDs; (4)2.7V to 5.5V Input Voltage; (5)Up to 80mA output current; (6)Analog brightness control; (7)Active-low or high shutdown input (’94/95); (8)Very small solution size and no inductor; (9)2.3μA (typ.) shutdown current; (10)325kHz switching frequency (min.); (11)Constant Frequency generates predictable noise spectrum; (12)Standard Micro SMD-14 package: 2.08mm X 2.403mm X 0.845mm High; (13)Thin Micro SMD-14 package: 2.08mm X 2.403mm X 0.600mm High.