Design Tools

Online ADIsimPower Voltage Regulator Design Tool: produces ready-to-go buck converter designs optimized for efficiency, space, cost, or part count.

Download ADP1864 Design Software: is similar to the online ADIsimPower tool but as an Excel application.

The ADP1864 is a compact, inexpensive, constant-frequency current-mode step-down dc-to-dc controller. The ADP1864 drives a P-channel MOSFET that regulates an output voltage as low as 0.8 V with ±2% accuracy, for up to 5 A load currents, from input voltages as high as 14 V.

The ADP1864 provides system flexibility by allowing accurate setting of the current limit with an external resistor, and the output voltage is easily adjustable using two external resistors. The ADP1864 includes an internal soft start to allow quick power-up while preventing input inrush current. Additional safety features include short-circuit protection, output overvoltage protection, and input undervoltage protection. Current-mode control provides fast and stable load transient performance, while the 580 kHz operating frequency allows a small inductor to be used in the system. To further the life of a battery source, the controller turns on the external P-channel MOSFET 100% of the duty cycle during dropout.

The ADP1864 operates over the −40°C to +125°C temperature range and is available in a small, low profile, 6-lead TSOT package.

Applications

Wireless devices

1- to 3-cell Li-Ion battery-powered applications

Set-top boxes

Processor core power supplies

Hard disk drives

Data Sheet, Rev. A, 2/07

Part#	Vin Range	Pwr Stage Vin	Vout Adj Options	Multi-Output	Shutdown Current	Supply Current (max)	Switching Frequency	Iout (max)	Synchronous	Step Down	Step Up	Pkg	Product Description	Price* (1000-4999)
ADP1621	2.9V-5.5V	As Low As 1V	Lossless ISens@<30V Vout, Resistor ISens@>30V	No	10µA	3mA	100 KHz - 1.5 MHz	-	No	No	Yes	MSOP-10	Constant-Frequency, Current-Mode, Step-Up DC/DC Controller	$1.30
ADP1821	3.7V-5.5V	1V-24V	0.6V to 85% PwrStgVin	No	10µA	2mA	300 kHz -600 kHz, Sync up to 1 MHz	20A	Yes	Yes	No	QSOP-16	20 A Step-Down DC-DC Controller	$1.35
ADP1822	3.7V-5.5V	1V-24V	0.6V to 85% PwrStgVin	No	10µA	2mA	300 kHz-600 kHz; Sync up to 1 MHz	20A	Yes	Yes	No	QSOP-24	20 A, PWM, Step-Down DC-DC Controller with Margining and Tracking	$1.40
ADP1823	3.7V-20V	1V-24V	0.6V to 85% PwrStgVin	Yes	20µA	3mA	300 kHz-600 kHz, Sync up to 1 MHz	20A	Yes	Yes	No	LFCSP-32	Versatile Dual, Interleaved Synchronous PWM Buck Controller w/ Tracking	$2.10
ADP1828	3.0V-18V	1V-24V	0.6V to 85% PwrStgVin	No	15µA	3mA	300 kHz to 600 kHz	-	Yes	Yes	No	QSOP-20	Synchronous Buck PWM, Step-Down, DC-to-DC Controller	$1.50
ADP1829	3.0V-18V	1V-24V	0.6V to 85% PwrStgVin	Yes	20µA	3mA	300 kHz-600 kHz, Sync up to 1 MHz	20A	Yes	Yes	-	LFCSP-32	Dual, Interleaved, Step-Down DC-to-DC Controller w/ Tracking	$2.10
ADP1864	3.15V-14V	3.15V-14V	0.8V to Vin	No	15µA	350µA	580 kHz	5A	No	Yes	No	TSOT-6	5A, Constant Frequency, Current-Mode Step-Down DC/DC Controller in TSOT	$1.05

* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

The model number is a specific version of a generic that can be purchased or sampled.

Status indicates the current lifecycle of the product. This can be one of 4 stages:

• Pre-Release: The model has not been released to general production, but samples may be available.
• Production: The model is currently being produced, and generally available for purchase and sampling.
• Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
• Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).

The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

For detailed drawings and chemical composition please consult our  Package Site

Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

This is the acceptable operating range of the device. The various ranges specified are as follows:

• Commercial: 0 to +70 degrees Celsius
• Military : -55 to +125 degrees Celsius
• Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
• Automotive: -40 to +125 degrees Celsius

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

This is the date Analog Devices, Inc. anticipates that the product will ship from the warehouse. Most orders ship within 48 hours of this date.Once an order has been placed, Analog Devices, Inc. will send an Order Acknowledgement email to confirm your delivery date. It is important to note the scheduled dock date on the order entry screen. We do take orders for items that are not in stock, so delivery may be scheduled at a future date. Also, please note the warehouse location for the product ordered. We have warehouses in the United States, Europe and Southeast Asia. Transit times from these sites may vary.

Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.