ADP2105 - ADI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

ADP2105
Manufacturer

ADI
ChipWorker Part#

CW389470637
RoHS

Lead free / RoHS Compliant
Description

1A/1.5A/2A Synchronous, Step-Down DC-to-DC Converters
Documentation

Datasheet

ADP2105 Global Supplier

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ADP2105 Specifications

Attribute	Attribute Value

Part Number	ADP2105
Manufacturer	ADI
ChipWorker Part#	CW389470637
Documentation	Datasheet
	expand all
Product Lifecycle Status	Active
RoHS	RoHS Compliant

Product Description

Product Details
The ADP2105 / ADP2106 / ADP2107 are low quiescent current, synchronous, step-down dc-to-dc converters in a compact 4 mm × 4 mm LFCSP package. At medium to high load currents, these devices use a current mode, constant frequency pulse-width modulation (PWM) control scheme for excellent stability and transient response. To ensure the longest battery life in portable applications, the ADP2105 / ADP2106 / ADP2107 use a pulse frequency modulation (PFM) control scheme under light load conditions that reduces switching frequency to save power.
The ADP2105 / ADP2106 / ADP2107 run from input voltages of 2.7 V to 5.5 V, allowing single Li+/Li− polymer cell, multiple alkaline/NiMH cells, PCMCIA, and other standard power sources. The output voltage of ADP2105 / ADP2106 / ADP2107 is adjustable from 0.8 V to the input voltage (indicated by ADJ), whereas the ADP2105 / ADP2106 / ADP2107 are available in preset output voltage options of 3.3 V, 1.8 V, 1.5 V, and 1.2 V (indicated by x.x V). Each of these variations is available in three maximum current levels: 1 A (ADP2105), 1.5 A (ADP2106), and 2 A (ADP2107). The power switch and synchronous rectifier are integrated for minimal external part count and high efficiency. During logic controlled shutdown, the input is disconnected from the output, and it draws less than 0.1 µA from the input source. Other key features include undervoltage lockout to prevent deep battery discharge and programmable soft start to limit inrush current at startup.
Applications
Mobile handsets
PDAs and palmtop computers
Telecommunication/networking equipment
Set top boxes
Audio/video consumer electronics
### Features and Benefits
Extremely high 97% efficiency
Ultralow quiescent current: 20 μA
1.2 MHz switching frequency
0.1 μA shutdown supply current
Maximum load current: 1 A
Input voltage: 2.7 V to 5.5 V
Output voltage: 0.8 V to VIN
Maximum duty cycle: 100%
Smoothly transitions into low dropout (LDO) mode
Internal synchronous rectifier
Small 16-lead 4 mm × 4 mm LFCSP package
Optimized for small ceramic output capacitors
Enable/shutdown logic input
Undervoltage lockout
Soft start
Supported by ADIsimPower™ design tool

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- Vacuum packed
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- Anti-vibration foam
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- Surface testing

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