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LM2757 bảng dữ liệu(PDF) 1 Page - Texas Instruments |
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LM2757 bảng dữ liệu(HTML) 1 Page - Texas Instruments |
1 / 27 page LM2757 VIN C2+ C2- 1 µF 0.47 µF VOUT 1 µF C1+ C1- 0.47 µF *Bump D1 is No Connect (NC) VIN = 3 V - 5.5 V B2,B3 A3 B1 A1 C3 C1,C2 A2 GND VOUT = 4.1 V (100 mA), 4.5 V (110 mA) 5 V (180 mA) M0 D3 M1 D2 COUT C2 C1 CIN Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM2757 SNVS536F – OCTOBER 2007 – REVISED JULY 2015 LM2757 Switched-Capacitor Boost Regulator With High Impedance Output in Shutdown 1 Features 3 Description The LM2757 is a constant-frequency pre-regulated 1 • Dual Gain Converter (2×, 3/2×) With up to 93% switched-capacitor charge pump that operates at Efficiency 1.25 MHz to produce a low-noise regulated output • Inductorless Solution Uses Only 4 Small Ceramic voltage. The device can be configured to provide up Capacitors to 100 mA at 4.1 V, 110 mA at 4.5 V, or 180 mA at 5 • Total Solution Area < 12 mm2 V. Excellent efficiency is achieved without the use of an inductor by operating the charge pump in a gain of • True Input-Output and Output-Input Disconnect either 3/2 or 2 according to the input voltage and • Up to 180-mA Output Current Capability (5 V) output voltage option selection. • Selectable 4.1-V, 4.5-V or 5-V Output The LM2757 presents a high impedance at the VOUT • Pre-Regulation Minimizes Input Current Ripple pin when shut down. This allows for use in • 1.24-MHz Switching Frequency for Low-Noise, applications that require the regulated output bus to Low-Ripple Output Voltage be driven by another supply while the LM2757 is shut down. • Integrated Overcurrent and Thermal Shutdown Protection The LM2757 device comes in a tiny 12-pin 0.4-mm pitch DSBGA package. A perfect fit for space- 2 Applications constrained, battery-operated applications, the device requires only 4 small, inexpensive ceramic • USB/USB-OTG/HDMI Power capacitors. Built-in soft-start, overcurrent protection, • Supercapacitor Charger and thermal shutdown features are also included in this device. • Keypad LED Drive • Audio Amplifier Power Supply Device Information(1) • Low-Current Camera Flash PART NUMBER PACKAGE BODY SIZE (MAX) • General Purpose Li-Ion-to-5-V Conversion LM2757 DSBGA (12) 1.641 mm × 1.581 mm • Cellular Phone SIM Cards (1) For all available packages, see the orderable addendum at the end of the data sheet. Typical Application 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
Số phần tương tự - LM2757 |
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Mô tả tương tự - LM2757 |
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