Features • Input voltage range of 4.5V–24V • Constant On-Time • No compensation needed • Maximum Load Current of 3A • Switching frequency of 100 kHz–500 kHz • Constant frequency across input range • TTL compatible shutdown thresholds • Low standby current of 12 µA • 130 mΩ internal MOSFET switch Description The LM2696 is a pulse width modulation (PWM) buck regulator capable of delivering up to 3A into a load. The control loop utilizes a constant on-time control scheme with input voltage feed forward. This provides a topology that has excellent transient response without the need for compensation. The input voltage feed forward ensures that a constant switching frequency is maintained across the entire VIN range. The LM2696 is capable of switching frequencies in the range of 100 kHz to 500 kHz. Combined with an integrated 130 mΩ high side NMOS switch the LM2696 can utilize small sized external components and provide high efficiency. An internal soft-start and power-good flag are also provided to allow for simple sequencing between multiple regulators. The LM2696 is available with an adjustable output in an exposed pad TSSOP-16 package. Applications • High efficiency step-down switching regulators • LCD Monitors • Set-Top Boxes

LM2696   4.50 <= V in Lower  V   <= V in Upper  V   <= 24.00 V out 1.29 <=  V <= 20.00 I out    A <= 3.00 Ambient Temperature  °C <= 100 What are WEBENCH® tools? MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

Typical Application click for larger image	Block Diagram click for larger image

Datasheet

Title		Size	Date	Other Language
	LM2696 3A, Constant On Time Buck Regulator	421 Kbytes	18-May-09	日本語

Featured Application Notes

Title		Size	Date	Other Language
	AN-1410: Application Note 1410 LM2696 Demonstration Board	566 Kbytes	14-Aug-06	中文

More Application Notes

Title		Size	Date	Other Language
	AN-1202: Application Note 1202 LM2698 Demoboard	217 Kbytes	10-May-04
	AN-1444: Application Note 1444 LM2695 Evaluation Board	716 Kbytes	15-Feb-06
	AN-1472: Application Note 1472 LM2694 Evaluation Board	796 Kbytes	16-May-06

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM2696MXA	ABCD150	0	34175	0	0	4234000	1	1201409060
LM2696MXAX	ABCD150	0	34175	0	0	4234000	1	1201409060

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

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