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LMZM23600SILT 데이터시트(PDF) 10 Page - Texas Instruments |
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LMZM23600SILT 데이터시트(HTML) 10 Page - Texas Instruments |
10 / 36 page + - + - MOSFET DRIVER HS CURRENT SENSE LS CURRENT SENSE OSCILLATOR PWM COMP. ERROR AMPLIFIER VOUT VIN GND FB EN 1-V REFERENCE ENABLE LOGIC PGOOD PFM MODE CONTROL Copyright © 2017, Texas Instruments Incorporated INT. REG. BIAS VCC BOOT MODE/SYNC SW UVLO THERMAL PROTECTION CONTROL LOGIC MOSFET DRIVER VCC HS LS POWER GOOD CONTROL ADJ VOUT OPTION FIXED VOUT OPTION OR 10 LMZM23600 SNVSB53 – FEBRUARY 2018 www.ti.com Product Folder Links: LMZM23600 Submit Documentation Feedback Copyright © 2018, Texas Instruments Incorporated 8 Detailed Description 8.1 Overview The LMZM23600 is a 4-V to 36-V wide-input voltage range, low quiescent current, high-performance DC-DC module designed specifically for space constrained industrial applications. The device is available in an adjustable output voltage option with 2.5-V to 15-V output range, as well as fixed 5-V and 3.3-V output options. The high level of integration and innovative packaging technology utilized in this nano module makes it possible to design a 5-V or 3.3-V 0.5-A switching converter solution with only an input capacitor, an output capacitor, and 27 mm² of available board space. 8.2 Functional Block Diagram 8.3 Feature Description 8.3.1 Control Scheme The LMZM23600 nano module utilizes peak-current-mode-control architecture. This enables the use of wide range of input voltages while maintaining constant switching frequency and good input and output transient response. The device can be used with 5-V, 12-V, or 24-V typical industrial input voltage rail. The short minimum on- and off-times ensure constant frequency regulation over a wide range of input to output voltage conversion ratios. The adjustable (ADJ) output voltage option operates at 1000-kHz switching frequency. The minimum on- and off- times allow for a duty factor window of 5% to 91% at 1000-kHz switching frequency. If the input voltage exceeds approximately 28 V on the ADJ version, the frequency is smoothly reduced from 1000 kHz as a function of input voltage. The switching frequency reduction allows output voltage regulation and the current mode control to operate with a duty factor below 5%. The fixed 5-V and 3.3-V output options operate at 750 kHz nominal switching frequency and the frequency fold back at high input voltage is not active or needed. |
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