LTC7820EUFD Demo Board | 2:1 Step-Down, 36V ≤ VIN ≤ 60V, VOUT = 0.5VIN @ up to 20A
Analog Devices Inc.
Demonstration circuit 2543B is a high efficiency, high
density, open loop charge pump (inductorless) DC/DC
converter. This demo board is a voltage divider which
achieves a 2:1 step-down ratio from an input voltage from
36V to 60V. The output voltage is a fixed ratio of half of the
input voltage (VIN/2) and can supply a 10A load current.
This demo board has the option to deliver a 20A maximum
load with the addition of 15 chip capacitors.
The DC2543B provides a very high efficiency solution of
98.7% when converting 48VIN to 24VOUT at 10A. When configured for a 20A output, an efficiency
of up to 98.4% is achievable for a 48VIN to 24VOUT
at 20A.
The demo board features the LTC7820, a fixed ratio high
voltage high power switched capacitor/charge pump
controller in a 4mm × 5mm QFN package. Please see
LTC7820 data sheet for more detailed information.
The DC2543B needs to be powered on with no load current
or a very small load current (less than 50mA) with
the default setup. Large load current can be applied after
VO is established. The board offers a disconnect FET
option which is controlled by the LTC7820 FAULT pin
to disconnect the load during startup as shown in the
schematic. Please refer to “Voltage Divider Prebalance
Before Switching” section in the LTC7820 data sheet for
more details regarding the startup of the voltage divider.
The board also features some protection functions
such as overcurrent and thermal shutdown to make it a
reliable solution.
| Distributor | SKU | Stock | MOQ | 1 | 10 | 50 | 100 | 1,000 | 10,000 |
|---|---|---|---|---|---|---|---|---|---|
| DigiKey | 505-DC2543B-ND | 1 | 1 | $265.26 | $265.26 | $265.26 | $265.26 | $265.26 | $265.26 |
| Analog Devices Inc | DC2543B | 0 | $229.51 | $229.51 | $229.51 | $229.51 | $229.51 | $229.51 | |
| element14 APAC | DC2543B | 0 | 1 | * $312.78 | * $312.78 | * $312.78 | * $312.78 | * $312.78 | * $312.78 |
| Farnell | DC2543B | 0 | 1 | * $236.73 | * $236.73 | * $236.73 | * $236.73 | * $236.73 | * $236.73 |
| Mouser Electronics | 584-DC2543B | 5 | 1 | $238.71 | $238.71 | $238.71 | $238.71 | $238.71 | $238.71 |
| Newark | DC2543B | 0 | 1 | $265.79 | $265.79 | $265.79 | $265.79 | $265.79 | $265.79 |
| Distributor | SKU | Stock | MOQ | 1 | 10 | 50 | 100 | 1,000 | 10,000 |
|---|---|---|---|---|---|---|---|---|---|
| DigiKey | ADM1266ACPZ-R7 | 370 | 1 | $35.63 | $28.95 | $27.28 | $27.10 | $23.79 | $23.79 |
| Analog Devices Inc | ADM1266ACPZ-R7 | 0 | $32.88 | $30.32 | $28.96 | $25.89 | $24.70 | $24.70 | |
| Arrow North American Components | ADM1266ACPZ-R7 | 0 | 750 | $16.57 | $16.35 | ||||
| element14 APAC | ADM1266ACPZ-R7 | 886 | 10 | $0.00 | $32.74 | $29.60 | $29.11 | $28.53 | $28.53 |
| Farnell | ADM1266ACPZ-R7 | 886 | 10 | $0.00 | $18.53 | $16.75 | $16.47 | $16.46 | $16.46 |
| Mouser Electronics | ADM1266ACPZ-R7 | 621 | 1 | $30.92 | $22.60 | $20.90 | $20.90 | $20.90 | $20.90 |
| Newark | ADM1266ACPZ-R7 | 889 | 1 | $30.92 | $23.22 | $21.10 | $20.19 | $20.19 | $20.19 |
| Verical Marketplace | ADM1266ACPZ-R7 | 212 | 1 | $30.50 | $28.03 | $26.20 | $23.37 | $18.32 | $18.32 |
| Win Source | ADM1266ACPZ-R7 | 1649 | 1 |
DC2008A
Analog Devices Inc.
The LTC1625 is a synchronous step-down switching regulator controller that drives external N-Channel power MOSFETs using few external components. Current mode control with MOSFET VDS sensing eliminates the need for a sense resistor and improves efficiency. The frequency of a nominal 150kHz internal oscillator can be synchronized to an external clock over a 1.5:1 frequency range.Burst Mode? operation at low load currents reduces switching losses and low dropout operation extends operating time in battery-powered systems. A forced continuous mode control pin can assist secondary winding regulation by disabling Burst Mode operation when the main output is lightly loaded.Fault protection is provided by foldback current limiting and an output overvoltage comparator. An external capacitor attached to the RUN/SS pin provides soft start capability for supply sequencing. A wide supply range allows operation from 3.7V (3.9V for LTC1625I) to 36V at the input and 1.19V to VIN at the output.Applications Notebook and Palmtop Computers, PDAs Cellular Telephones and Wireless Modems Battery Chargers Distributed Power
| Distributor | SKU | Stock | MOQ | 1 | 10 | 50 | 100 | 1,000 | 10,000 |
|---|---|---|---|---|---|---|---|---|---|
| DigiKey | DC2008A-ND | 0 | 1 | $125.20 | $125.20 | $125.20 | $125.20 | $125.20 | $125.20 |
| Analog Devices Inc | DC2008A | 0 | $92.29 | $92.29 | $92.29 | $92.29 | $92.29 | $92.29 | |
| Arrow North American Components | DC2008A | 0 | 1 | $100.87 | $99.86 | $97.88 | $96.90 | $94.02 | $93.08 |
| Mouser Electronics | 584-DC2008A | 0 | 1 | $110.39 | $110.39 | $110.39 | $110.39 | $110.39 | $110.39 |
| Verical Marketplace | DC2008A | 63 | 1 | $105.01 | $105.01 | $105.01 | $105.01 | $105.01 | $105.01 |
MAX9850ETI/GH9
Analog Devices Inc.
Audio D/A Converter ICs Stereo Audio DAC with DirectDrive Headphone Amplifier
| Distributor | SKU | Stock | MOQ | 1 | 10 | 50 | 100 | 1,000 | 10,000 |
|---|---|---|---|---|---|---|---|---|---|
| DigiKey | 2156-MAX9850ETI/GH9-ND | 2307 | 12 | $27.11 | $27.11 | $27.11 | $27.11 | ||
| Mouser Electronics | 700-MAX9850ETI/GH9 | 0 | 1 |
| Distributor | SKU | Stock | MOQ | 1 | 10 | 50 | 100 | 1,000 | 10,000 |
|---|---|---|---|---|---|---|---|---|---|
| DigiKey | AD667SD | 0 | $340.66 | $10.00 | $25.00 | $25.00 | $25.00 | $25.00 | |
| Analog Devices Inc | AD667SD | 0 | $222.66 | $221.90 | $221.90 | $221.90 | $221.90 | $221.90 | |
| Arrow North American Components | AD667SD | 0 | 2 | $279.50 | $277.86 | $276.20 | $271.14 | $265.94 | |
| Mouser Electronics | AD667SD | 3 | 1 | $126.56 | $118.93 | $116.68 | $116.68 | $116.68 | $116.68 |
| Newark | AD667SD | 0 | $120.84 | $120.84 | $120.84 | $120.84 | $120.84 | $120.84 | |
| Verical Marketplace | AD667SD | 66 | 2 | $247.01 | $247.01 | $247.01 | $247.01 | $247.01 | |
| Win Source | AD667SD | 1520 | 1 |
| Distributor | SKU | Stock | MOQ | 1 | 10 | 50 | 100 | 1,000 | 10,000 |
|---|---|---|---|---|---|---|---|---|---|
| DigiKey | ADA4627-1ACPZ-R7CT-ND | 1338 | 1 | $10.59 | $8.28 | $7.70 | $7.19 | $5.38 | $6.36 |
| Analog Devices Inc | ADA4627-1ACPZ-R7 | 0 | $10.85 | $9.80 | $9.34 | $8.11 | $7.06 | $7.06 | |
| Arrow North American Components | ADA4627-1ACPZ-R7 | 0 | 1500 | $1.19 | $1.17 | $1.15 | $1.13 | $1.11 | $0.00 |
| element14 APAC | ADA4627-1ACPZ-R7 | 1457 | 10 | * $8.86 | * $7.80 | * $6.59 | * $6.06 | * $6.06 | |
| Farnell | ADA4627-1ACPZ-R7 | 1460 | 10 | * $9.08 | * $7.98 | * $6.59 | * $6.22 | * $6.22 | |
| Mouser Electronics | 584-ADA4627-1ACPZ-R7 | 0 | $4.53 | ||||||
| Newark | ADA4627-1ACPZ-R7 | 1460 | 1 | $10.40 | $7.71 | $6.19 | $5.64 | $5.64 | $5.64 |
| Verical Marketplace | ADA4627-1ACPZ-R7 | 259 | 1 | $0.00 | $7.69 | $7.19 | $6.75 | $6.01 | $6.01 |
| Win Source | ADA4627-1ACPZ-R7 | 5760 |
AD7824KRZ-REEL
Analog Devices Inc.
High Speed, 4-Channel, 8-Bit CMOS ADC Features: 4 or 8 Analog Input Channels Built-In Track-and-Hold Function 10 kHz Signal Handling on Each Channel Fast Microprocessor Interface Single 5 V Supply Low Power: 50 mW Fast Conversion Rate: 2.5 µs/Channel Tight Error Specification: 1/2 LSB
| Distributor | SKU | Stock | MOQ | 1 | 10 | 50 | 100 | 1,000 | 10,000 |
|---|---|---|---|---|---|---|---|---|---|
| DigiKey | AD7824KRZ-REEL | 0 | $46.11 | $46.11 | $46.11 | $46.11 | $46.11 | $46.11 | |
| Analog Devices Inc | AD7824KRZ-REEL | 0 | $35.39 | $35.39 | |||||
| Arrow North American Components | AD7824KRZ-REEL | 0 | 1000 | ||||||
| Mouser Electronics | AD7824KRZ-REEL | $18.15 |
| Distributor | SKU | Stock | MOQ | 1 | 10 | 50 | 100 | 1,000 | 10,000 |
|---|---|---|---|---|---|---|---|---|---|
| DigiKey | AD2S80ASD | 0 | $669.11 | $669.11 | $669.11 | $669.11 | $669.11 | $669.11 | |
| Analog Devices Inc | AD2S80ASD | 0 | $802.94 | $802.94 | $802.94 | $802.94 | $802.94 | $802.94 | |
| Arrow Europe | AD2S80ASD | 89 | 1 | $681.23 | $681.23 | $681.23 | $681.23 | $681.23 | $681.23 |
| Arrow North American Components | AD2S80ASD | 30 | 1 | $624.49 | $624.49 | $624.49 | $624.49 | $624.49 | $624.49 |
| Mouser Electronics | AD2S80ASD | 3 | 1 | $692.47 | $692.47 | $692.47 | $692.47 | $692.47 | $692.47 |
| Verical Marketplace | AD2S80ASD | 30 | 1 | $624.49 | $624.49 | $624.49 | $624.49 | $624.49 | $624.49 |
| Win Source | AD2S80ASD | 680 | 1 |







