Linear Technology DC1892A Demo Manual

Description LTM4630EV High Efficiency, Dual 18A Step-Down Power µModule Regulator Demonstration circuit 1892A features the LTM®4630EV, the high efficiency, high density, dual 18A, switch mode step-down power module regulator. The input voltage is from 4.5V to 15V. The output voltage is programmable from 0.6V to 1.8V. DC1892A ...

Quick Start Procedure Demonstration circuit DC1892A is easy to set up to evalu- ate the performance of the LTM4630EV. Please refer to Figure 2 for proper measurement setup and follow the procedure below: 1. Place jumpers in the following positions for a typical application: JP1 JP2 JP3 JP4 JP5 JP6 MODE RUN1 RUN2 TRACK1 SEL. TR ...

Quick Start Procedure + – + – + – A + – A + – A LOAD (0A TO 18A) LOAD (0A TO 18A) VIN 4.5V TO 15V + – VOUT1 + – VOUT1 Figure 2. Test Setup of the DC1892A ...

Figure 3. Measured Efficiency on Channel 1. VOUT1 = 1.5V, fSW = 500kHz, Channel 2 Disabled, CCM, 0A to 18A Quick Start Procedure Figure 4. Measured Efficiency on Channel 2. VOUT2 = 1V, fSW = 500kHz, Channel 1 Disabled, CCM, 0A to 18A LOAD CURRENT (A) 0 65 EFFICIENCY (%) 90 85 80 75 70 95 10 12 14 16 18 2 4 6 dc1892a F03 8 VIN ...

Quick Start Procedure Figure 5. Measured Channel 1, 9A to 18A Load Transient (VIN = 12V, VOUT1 = 1.5V) Figure 6. Measured Channel 2, 9A to 18A Load Transient (VIN = 12V, VOUT2 = 1V) 9A to 18A LOAD STEP 1.5V OUTPUT (20MHz BW) [50mV/DIV] 9A to 18A LOAD STEP 1V OUTPUT (20MHz BW) [50mV/DIV] ...

Figure 7. Thermal Capture at 12VIN, 1.5VOUT1 at 18A and 1VOUT2 at 18A (TA = 25°C, 200 LFM Airflow and No Heat Sink) Quick Start Procedure ...

Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 4 CIN2, CIN3, CIN4, CIN5 CAP., X5R, 22µF, 25V, 10%,1210 MURATA, GRM32ER61E226KE15 2 2 COUT1, COUT7, COUT9, COUT10 CAP., 470µF, 4V, POSCAP, F8 SANYO, 4TPE470MCL 3 2 COUT4, COUT5 CAP., X5R, 100µF, 6.3V, 20%, 1210 AVX, 12106D1 ...

5 5 4 4 3 3 2 2 1 1 D D C C B B A A VIN+ VIN- VIN GND 4.5V - 15V VOUT1 GND VO1+ VO1- 1.5V / 18A 1.0V / 18A GND VO2- VO2+ VOUT2 ON TRACK1 CLKOUT PHASE 120 90 60 o o o ON EXT. SOFT-START TRACK1 SEL. NOTE: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE 0603.    VOUT1 VIN INTVCC ...

Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. 5 5 4 4 3 3 2 2 1 1 ...

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