ADP2300 1.2 A, 20 V, 700 kHz Nonsynchronous Step-down Switching Regulator

The ADP2300/ADP2301 are compact, constant-frequency, current-mode, step-down dc-to-dc regulators with integrated power MOSFET. The ADP2300/ADP2301 devices run from any input voltage from 3.0 V up to 20 V, making them suitable for a wide range of applications. A precise, low voltage internal reference makes these devices ideal for generating a regulated output voltage as low as 0.8 V, with ±2% accuracy, for up to 1.2 A load current.

There are two frequency options: the ADP2300 runs at 700 kHz and the ADP2301 runs at 1.4 MHz. These options allow users to make decisions based on the trade-off between efficiency and the size of the total solution. Current-mode control provides fast and stable line and load transient performance. Each ADP2300/ ADP2301 device includes an internal soft start to prevent inrush current at power up. Other key safety features include short-circuit protection, thermal shutdown (TSD) and input undervoltage lockout (UVLO). Precision enable pin threshold voltage allows ADP2300/ADP2301 to be easily sequenced from other input/ output supplies, or the enable pin can be used as a programmable UVLO input by using resistive divider.

The ADP2300/ADP2301 are available in a 6-lead TSOT package and are rated for the −40°C to +125°C junction temperature range.

Applications

LDO replacement for digital load applications
Intermediate power rail conversion
Communications and networking
Industrial and instrumentation
Healthcare and Medical
Consumer

Features and Benefits

High efficiency, up to 91%
1.2 A maximum load current
±2% output accuracy over temperature range
Wide input voltage range: 3.0 V to 20 V
700kHz (ADP2300) or 1.4MHz (ADP2301) switching frequency options

Current-mode control architecture
Output voltage from 0.8 V to 0.85×VIN
Automatic PFM/PWM mode switching
Precision enable pin with hysteresis
Integrated high-side MOSFET
Available in ultrasmall, 6-lead TSOT package
See data sheet for additional features

Power Management

Switching Regulators

Design Tools

Reference Designs

Data Sheets

Document	note
ADP2300/ADP2301: 1.2 A, 20 V, 700 kHz/1.4 MHz, Nonsynchronous Step-Down Regulator Data Sheet (Rev. C)	PDF 683 kB

Application Notes

Document	note
AN-1141: Powering a Dual Supply Precision ADC with Switching Regulators (Rev. 0)	PDF 640 kB
AN-1083: Designing an Inverting Buck Boost Using the ADP2300 and ADP2301 Switching Regulators (Rev. A)	PDF 217 kB