MP1543 MPS, MP1543 Datasheet
MP1543
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MP1543 Summary of contents
Page 1
... The internal compensation and soft-start minimizes the external component count and limits the inrush current during startup. The MP1543 regulates the output voltage and provides up to 400mA from a 2-cell AA with a 3.3V output. The MP1543 is offered in a thin SOT23-5 package ...
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... GND 2 OUT 3 4 MP1543_PD01-TSOT23-5 Part Number* Package MP1543DJ TSOT23-5 * For Tape & Reel, add suffix –Z (eg. MP1543DJ–Z) For Lead Free, add suffix –LF (eg. MP1543DJ–LF–Z) ELECTRICAL CHARACTERISTICS 3.3V +25°C, unless otherwise noted. EN OUT A Parameter Startup Supply Voltage Output Voltage Range ...
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... TM MP1543 — 1.5A, 500KHZ SYNCHRONOUS RECTIFIED STEP-UP CONVERTER TYPICAL PERFORMANCE CHARACTERISTICS Circuit on front page 2.4V Efficiency vs Load Current 100 V = =2. =1. 100 LOAD CURRENT (mA) MP1543-TPC01 Continuous Mode Operation I = 400mA LOAD V SW 2V/div OUT 50mV/div. I INDUCTOR ...
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... FB to set the output voltage. 2 GND Ground. 3 OUT Supply Input for the MP1543. Connect to the output of the converter Output Switching Node the drain of the internal low-side N-Channel MOSFET and high-side P-Channel MOSFET. Connect the inductor complete the step-up converter Regulator On/Off Control Input ...
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... P-Channel MOSFET connects to SW and there is no current path from SW to OUT. Therefore, the output voltage discharges to ground. When the MP1543 is enabled (EN = High), the body of the P-Channel MOSFET connects to OUT and forms a forward diode from SW to OUT. Thus the output voltage rises up toward the input voltage ...
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... TM MP1543 — 1.5A, 500KHZ SYNCHRONOUS RECTIFIED STEP-UP CONVERTER APPLICATION INFORMATION COMPONENT SELECTION Setting the Output Voltage Set the output voltage by selecting the resistive voltage divider ratio. The voltage divider drops the output voltage to the 1.2V feedback voltage. Use a 100kΩ resistor for R2 of the voltage divider ...
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... TM MP1543 — 1.5A, 500KHZ SYNCHRONOUS RECTIFIED STEP-UP CONVERTER Selecting the Feed-Forward Capacitor A feed-forward capacitor C3 in parallel with the high-side resistor R1 can be added to improve the output ripple at discontinuous conduction mode and the load transient response (see Figure 2 220pF for this capacitor is recommended for 3.3V output applications. ...
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... TM MP1543 — 1.5A, 500KHZ SYNCHRONOUS RECTIFIED STEP-UP CONVERTER V IN 2.5V - 4.2V EN Figure 4—5V Typical Application Circuit with External Schottky Diode and Output Disconnect MP1543 Rev. 1.0 1/11/2006 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited OUT 5 MP1543 GND 2 Required www.MonolithicPower.com © 2006 MPS. All Rights Reserved. ...
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... TM MP1543 — 1.5A, 500KHZ SYNCHRONOUS RECTIFIED STEP-UP CONVERTER PACKAGE INFORMATION 2.90 BSC 0.950 0.950 TYP. TYP 0.300(Min 0.500(Max) (5 PLCS) NOTE: 1. Dimensions and tolerances are as per ANSI Y14.5M, 1994. 2. Die is facing up for mold. Die is facing down for trim/form, ie. reverse trim/form. 3. Dimensions are exclusive of mold flash and gate burr. ...