LM3691 Series

High Accuracy, Miniature 1A, Step-Down DC-DC Converter for Portable Applications

Catalog

High Accuracy, Miniature 1A, Step-Down DC-DC Converter for Portable Applications

Part	Voltage - Input (Max) [Max]	Frequency - Switching	Topology	Supplier Device Package	Output Configuration	Voltage - Output (Min/Fixed)	Operating Temperature [Min]	Operating Temperature [Max]	Number of Outputs	Voltage - Input (Min) [Min]	Current - Output	Package / Case	Output Type	Function	Mounting Type	Voltage - Output	Outputs and Type	Outputs and Type	Utilized IC / Part	Main Purpose	Voltage - Input [Min]	Voltage - Input [Max]	Regulator Topology	Supplied Contents	Board Type
Texas Instruments LM3691TLX-1.8/NOPB	5.5 V	4 MHz	Buck	6-DSBGA (1.5x1.3)	Positive	1.8 V	-30 °C	85 °C	1	2.3 V	1 A	6-WFBGA DSBGA	1.81 mOhm	Step-Down	Surface Mount
Texas Instruments LM3691TL-1.0/NOPB	5.5 V	4 MHz	Buck	6-DSBGA (1.5x1.3)	Positive	1 V	-30 °C	85 °C	1	2.3 V	1 A	6-WFBGA DSBGA	1.81 mOhm	Step-Down	Surface Mount
Texas Instruments LM3691TL-1.8EV/NOPB		4 MHz									1 A					1.8 V	Non-Isolated	1	LM3691	DC/DC Step Down	2.3 V	5.5 V	Buck	Board(s)	Fully Populated
Texas Instruments LM3691TL-0.75/NOPB	5.5 V	4 MHz	Buck	6-DSBGA (1.5x1.3)	Positive	0.75 V	-30 °C	85 °C	1	2.3 V	1 A	6-WFBGA DSBGA	1.81 mOhm	Step-Down	Surface Mount
Texas Instruments LM3691TL-3.3/NOPB	5.5 V	4 MHz	Buck	6-DSBGA (1.5x1.3)	Positive	3.3 V	-30 °C	85 °C	1	2.3 V	1 A	6-WFBGA DSBGA	1.81 mOhm	Step-Down	Surface Mount
Texas Instruments LM3691TLX-1.0/NOPB	5.5 V	4 MHz	Buck	6-DSBGA (1.5x1.3)	Positive	1 V	-30 °C	85 °C	1	2.3 V	1 A	6-WFBGA DSBGA	1.81 mOhm	Step-Down	Surface Mount
Texas Instruments LM3691TL-1.5/NOPB	5.5 V	4 MHz	Buck	6-DSBGA (1.5x1.3)	Positive	1.5 V	-30 °C	85 °C	1	2.3 V	1 A	6-WFBGA DSBGA	1.81 mOhm	Step-Down	Surface Mount
Texas Instruments LM3691TLX-1.5/NOPB	5.5 V	4 MHz	Buck	6-DSBGA (1.5x1.3)	Positive	1.5 V	-30 °C	85 °C	1	2.3 V	1 A	6-WFBGA DSBGA	1.81 mOhm	Step-Down	Surface Mount
Texas Instruments LM3691TL-2.5/NOPB	5.5 V	4 MHz	Buck	6-DSBGA (1.5x1.3)	Positive	2.5 V	-30 °C	85 °C	1	2.3 V	1 A	6-WFBGA DSBGA	1.81 mOhm	Step-Down	Surface Mount
Texas Instruments LM3691TLX-2.5/NOPB	5.5 V	4 MHz	Buck	6-DSBGA (1.5x1.3)	Positive	2.5 V	-30 °C	85 °C	1	2.3 V	1 A	6-WFBGA DSBGA	1.81 mOhm	Step-Down	Surface Mount

Catalog

High Accuracy, Miniature 1A, Step-Down DC-DC Converter for Portable Applications

Key Features

• Input Voltage: 2.3 V to 5.5 VOutput Voltage: 0.75 V to 3.3 V±1% DC Output Voltage Precision4-MHz Switching Frequency64-μA (typical) Quiescent Current in ECO Mode1-A Maximum Load CapabilityAutomatic ECO/PWM Mode SwitchingMODE Pin to Select ECO/Forced PWM ModeCurrent Overload and Thermal Shutdown ProtectionsOnly Three Tiny Surface-Mount External Components Required (Solution Size Less Than 15 mm2)Input Voltage: 2.3 V to 5.5 VOutput Voltage: 0.75 V to 3.3 V±1% DC Output Voltage Precision4-MHz Switching Frequency64-μA (typical) Quiescent Current in ECO Mode1-A Maximum Load CapabilityAutomatic ECO/PWM Mode SwitchingMODE Pin to Select ECO/Forced PWM ModeCurrent Overload and Thermal Shutdown ProtectionsOnly Three Tiny Surface-Mount External Components Required (Solution Size Less Than 15 mm2)

Description

The LM3691 step-down DC-DC converter is optimized for powering ultra-low-voltage circuits from a single Li-Ion cell or 3 cell NiMH/NiCd batteries. It provides up to 1-A load current over an input voltage range from 2.3 V to 5.5 V. There are several different fixed voltage output options available. The LM3691 has a mode-control pin that allows the user to select Forced PWM mode or ECO mode that changes modes between gated PWM mode and PWM automatically, depending on the load. In ECO mode, the device offers superior efficiency and very low IQunder light load conditions. ECO mode extends the battery life through reduction of the quiescent current during light load conditions and system standby. The LM3691 is available in a 6-pin DSBGA package. Only three external surface-mount components, a1-μH inductor, a 4.7-μF input capacitor, and a 4.7-μF output capacitor, are required. The LM3691 step-down DC-DC converter is optimized for powering ultra-low-voltage circuits from a single Li-Ion cell or 3 cell NiMH/NiCd batteries. It provides up to 1-A load current over an input voltage range from 2.3 V to 5.5 V. There are several different fixed voltage output options available. The LM3691 has a mode-control pin that allows the user to select Forced PWM mode or ECO mode that changes modes between gated PWM mode and PWM automatically, depending on the load. In ECO mode, the device offers superior efficiency and very low IQunder light load conditions. ECO mode extends the battery life through reduction of the quiescent current during light load conditions and system standby. The LM3691 is available in a 6-pin DSBGA package. Only three external surface-mount components, a1-μH inductor, a 4.7-μF input capacitor, and a 4.7-μF output capacitor, are required.