lm2770sdx-12157 National Semiconductor Corporation, lm2770sdx-12157 Datasheet
lm2770sdx-12157
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lm2770sdx-12157 Summary of contents
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... Soft-start, short-circuit protection, current-limit protection, and thermal-shutdown protection are also included. The LM2770 is available in National’s small 10-pin Leadless Leadframe Package (LLP-10). Typical Application Circuit © 2004 National Semiconductor Corporation Features n High Efficiency Multi-Gain Architecture: Peak Power > Efficiency 85% n Output Voltage Pairs: 1 ...
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... Order Number 1.2V / 1.5V LM2770SD-1215 1.2V / 1.5V LM2770SDX-1215 1.2V / 1.575V LM2770SD-12157 1.2V / 1.575V LM2770SDX-12157 www.national.com National Semiconductor Package Number SDA10A Output Voltage Select Logic Input low low voltage. (See Order Information for available voltage OUT options) Enable Pin Logic Input. If high, part is enabled. If low, part is in shutdown. ...
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Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. V Pin Voltage IN EN, SLEEP, and V Pin Voltages SEL Continuous Power Dissipation (Note 3) V Short to ...
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Electrical Characteristics Limits in standard typeface are for T (-30˚C ≤ T ≤ +105˚C) . Unless otherwise noted, specifications apply to the LM2770 Typical Application Circuit (pg. 1) with 3.6V; V(EN 1.8V, V(SLEEP) = ...
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Electrical Characteristics Note 7: Maximum ambient temperature (T A-MAX dissipation of the device in the application (P D-MAX following equation – (θ A-MAX J-MAX-OP JA Note 8: Junction-to-ambient thermal resistance is highly application and board-layout ...
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Block Diagram www.national.com 6 20126003 ...
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Typical Performance Characteristics o 1.0µ 10µ Capacitors are low-ESR multi-layer ceramic capacitors (MLCC’s). OUT A Output Voltage vs. Input Voltage: V Output Voltage vs. Input Voltage: V Output Voltage vs. Input Voltage: V Unless ...
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Typical Performance Characteristics o 1.0µ 10µ Capacitors are low-ESR multi-layer ceramic capacitors (MLCC’s). (Continued) OUT A Load Regulation: V OUT Load Regulation: V OUT Input Voltage RIpple V = 3.6V 1.5V, I ...
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Typical Performance Characteristics o 1.0µ 10µ Capacitors are low-ESR multi-layer ceramic capacitors (MLCC’s). (Continued) OUT A Load Step V = 3.6V 1.5V, Load = 10mA - 150mA step IN OUT CH1 (top): ...
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Operation Description OVERVIEW The LM2770 is a switched capacitor converter that produces a regulated low voltage output. The core of the part is a highly efficient charge pump that utilizes multiple fractional gains and pulse-frequency-modulated (PFM) switching to minimize power ...
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Operation Description source. This can be done, but the voltage on the output pin of the LM2770 must not be brought above the input voltage. The output pin will draw a small amount of current when driven externally due the ...
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Application Information INPUT CAPACITOR AND INPUT VOTLAGE RIPPLE The input capacitor ( reservoir of charge that aids a IN quick transfer of charge from the supply to the flying capaci- tors during the charge phase of operation. ...
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Layout Guidelines Proper board layout will help to ensure optimal performance of the LM2770 circuit. The following guidelines are recom- mended: • Place capacitors as close to the LM2770 as possible, and preferably on the same side of the board ...
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Physical Dimensions inches (millimeters) unless otherwise noted SDA10A: 10-Pin Non-Pullback Leadless Leadframe Package National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without ...