Datasheet LTM4642 (Analog Devices) - 6

LTM4642
Typical perForMance characTerisTics (Refer to Figures 19 and 20) TA = 25°C, unless otherwise noted. 12VIN to 1.5VOUT Transient 3.3VIN to 2.5VOUT Transient 5VIN to 2.5VOUT Transient Response Response Response
IN OUT IN OUT IN OUT 1.5VOUT 2.5VOUT 2.5VOUT 50mV/DIV 100mV/DIV 100mV/DIV ISTEP = I I 2A/µs STEP = 2A/µs STEP = 2A/µs 2A/DIV 2A/DIV 2A/DIV 4642 G10 20µs/DIV 4642 G11 20µs/DIV 4642 G12 20µs/DIV COUT = 120µF 22mΩ ESR OSCON SVP, COUT = 47µF CERAMIC COUT = 47µF CERAMIC 47µF CERAMIC CFF = 68pF CFF = 68pF CFF = 470pF fSW = 600kHz fSW = 800kHz fSW = 800kHz
12VIN to 2.5VOUT Transient 5VIN to 3.3VOUT Transient 12VIN to 3.3VOUT Transient Response Response Response
IN OUT IN OUT IN OUT 2.5VOUT 3.3VOUT 3.3VOUT 100mV/DIV 100mV/DIV 100mV/DIV ISTEP = I I 2A/µs STEP = 2A/µs STEP = 2A/µs 2A/DIV 2A/DIV 2A/DIV 4642 G13 20µs/DIV 4642 G14 20µs/DIV 4642 G15 20µs/DIV COUT = 47µF CERAMIC COUT = 47µF CERAMIC COUT = 47µF CERAMIC CFF = 68pF CFF = 68pF CFF = 68pF fSW = 1MHz fSW = 800kHz fSW = 1MHz
12VIN to 5VOUT Transient 6VIN to 5VOUT Transient Response Response Clock Synchronization
IN OUT IN OUT EXTCLK 5V/DIV 5VOUT 5VOUT 100mV/DIV 100mV/DIV VSW1 10V/DIV VSW2 ISTEP = I 10V/DIV 2A/µs STEP = 2A/µs 2A/DIV 2A/DIV 4642 G16 20µs/DIV 4642 G17 20µs/DIV 4642 G18 1µs/DIV INPUT CAPACITOR 680µF 10V, COUT = 47µF CERAMIC LOW IMPEDANCE INPUT CAN USE MUCH LESS CFF = 68pF COUT = 47µF CERAMIC fSW = 1.2MHz CFF = 68pF fSW = 600kHz 4642fb 6 For more information www.linear.com/LTM4642 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Description Package Photograph Design Resources Related Parts