LM2650M-ADJ/NOPB ,Synchronous Step-Down DC/DC Converter 24-SOIC -40 to 125 SNVS133C –JUNE 1999–REVISED APRIL 2013(1)PIN DESCRIPTIONSPins Description1, 12 SUB: These pins mak ..
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LM2651MTC-1.8 ,1.5A High Efficiency Switching RegulatorLM2651 1.5A High Efficiency Synchronous Switching RegulatorMarch 2001LM26511.5A High Efficiency Syn ..
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LM2650M-ADJ/NOPB
Synchronous Step-Down DC/DC Converter
LM2650
www.ti.com SNVS133C–JUNE 1999–REVISED APRIL 2013
LM2650 Synchronous Step-Down DC/DC Converter
Checkfor Samples: LM2650
1FEATURES DESCRIPTIONThe LM2650 is a step-down DC/DC converter
Ultra High Efficiencies (95% possible) featuring high efficiency overa 3Ato milliamperes
• High Efficiency Overa 3Ato Milliamperes load range. This feature makes the LM2650 an ideal
Load Range fitin battery-powered applications that demand long
Synchronous Switchingof Internal NMOS battery lifein both run and standby modes.
Power FETs The LM2650 also features a logic-controlled
• Wide Input Voltage Range (4.5Vto 18V) shutdown modein whichit drawsat most 25μA from
the input power supply.
• Output Voltage Adjustable from 1.5Vto 16V Automatic Low-Power Sleep Mode The LM2650 employsa fixed-frequency pulse-width
modulation (PWM) and synchronous rectificationto
• Logic-Controlled Micropower Shutdown (IQSD≤ achieve very high efficiencies.In many applications,
25µ A) efficiencies reach 95%+ for loads around 1A and
• Frequency Adjustable upto 300 kHz exceed 90% for moderateto heavy loads from 0.2A
Frequency Synchronization with External to 2A.
Signal A low-power hysteretic or "sleep" mode keeps
• Programmable Soft-Start efficiencies highat light loads. The LM2650 enters
and exits sleep mode automatically as the load
• Short-Circuit Current Limitingcrosses "sleep in" and "sleep out" thresholds. The
• Thermal Shutdown LM2650 provides nodes for programming both
• Availablein 24-lead Small-Outline Package thresholds via external resistors.A logic input allows
the userto override the automatic sleep feature and
APPLICATIONS keep the LM2650in PWM mode regardlessof the
load level.
• Notebook and Palmtop Personal Computers optional soft-start feature limits current surges
• Portable Data Terminals from the input power supplyat start up and provides
• Modems a simple means of sequencing multiple power
• Portable Instruments supplies.
Global Positioning Devices (GPSs) Battery-Powered Digital Devices