ADP2140 Series

3 MHz, 600mA, Low Quiescent Current Buck with 300 mA LDO Regulator

Catalog

3 MHz, 600mA, Low Quiescent Current Buck with 300 mA LDO Regulator

Part	Voltage - Supply [Max]	Voltage - Supply [Min]	Voltage/Current - Output 2	Frequency - Switching	Supplier Device Package	Operating Temperature [Max]	Operating Temperature [Min]	Number of Outputs	Voltage/Current - Output 1 [custom]	Voltage/Current - Output 1 [custom]	Package / Case	Mounting Type	Topology	Voltage/Current - Output 1
Analog Devices ADP2140ACPZ3318R7	5.5 V	1.65 V	1.8 V 300 mA	3 MHz	10-LFCSP-WD (3x3)	125 °C	-40 °C	2	3.3 V	600 mA	10-VFDFN Exposed Pad CSP	Surface Mount	Linear (LDO) (1) Step-Down (Buck) Synchronous (1)
Analog Devices ADP2140ACPZ2518R7	5.5 V	1.65 V	1.8 V 300 mA	3 MHz	10-LFCSP-WD (3x3)	125 °C	-40 °C	2	2.5 V	600 mA	10-VFDFN Exposed Pad CSP	Surface Mount	Linear (LDO) (1) Step-Down (Buck) Synchronous (1)
Analog Devices ADP2140ACPZ1233R7	5.5 V	1.65 V	3.3 V 300 mA	3 MHz	10-LFCSP-WD (3x3)	125 °C	-40 °C	2	1.2 V	600 mA	10-VFDFN Exposed Pad CSP	Surface Mount	Linear (LDO) (1) Step-Down (Buck) Synchronous (1)
Analog Devices ADP2140ACPZ1528R7	5.5 V	1.65 V	2.8 V 300 mA	3 MHz	10-LFCSP-WD (3x3)	125 °C	-40 °C	2	1.5 V	600 mA	10-VFDFN Exposed Pad CSP	Surface Mount	Linear (LDO) (1) Step-Down (Buck) Synchronous (1)
Analog Devices ADP2140ACPZ3315R7	5.5 V	1.65 V	1.5 V 300 mA	3 MHz	10-LFCSP-WD (3x3)	125 °C	-40 °C	2	3.3 V	600 mA	10-VFDFN Exposed Pad CSP	Surface Mount	Linear (LDO) (1) Step-Down (Buck) Synchronous (1)
Analog Devices ADP2140ACPZ18812R7	5.5 V	1.65 V	1.2 V 300 mA	3 MHz	10-LFCSP-WD (3x3)	125 °C	-40 °C	2	1.875 V	600 mA	10-VFDFN Exposed Pad CSP	Surface Mount	Linear (LDO) (1) Step-Down (Buck) Synchronous (1)
Analog Devices ADP2140ACPZ1218R7	5.5 V	1.65 V	1.8 V 300 mA	3 MHz	10-LFCSP-WD (3x3)	125 °C	-40 °C	2	1.2 V	600 mA	10-VFDFN Exposed Pad CSP	Surface Mount	Linear (LDO) (1) Step-Down (Buck) Synchronous (1)
Analog Devices ADP2140ACPZ3325R7	5.5 V	1.65 V	2.5 V 300 mA	3 MHz	10-LFCSP-WD (3x3)	125 °C	-40 °C	2	3.3 V	600 mA	10-VFDFN Exposed Pad CSP	Surface Mount	Linear (LDO) (1) Step-Down (Buck) Synchronous (1)
Analog Devices ADP2140ACPZ1533R7	5.5 V	1.65 V	3.3 V 300 mA	3 MHz	10-LFCSP-WD (3x3)	125 °C	-40 °C	2	1.5 V	600 mA	10-VFDFN Exposed Pad CSP	Surface Mount	Linear (LDO) (1) Step-Down (Buck) Synchronous (1)
Analog Devices ADP2140ACPZ1833R7	5.5 V	1.65 V	1.5 V 300 mA	3 MHz	10-LFCSP-WD (3x3)	125 °C	-40 °C	2			10-VFDFN Exposed Pad CSP	Surface Mount	Linear (LDO) (1) Step-Down (Buck) Synchronous (1)	1.8 V 600 mA

Catalog

3 MHz, 600mA, Low Quiescent Current Buck with 300 mA LDO Regulator

Key Features

• Input voltage range: 2.3 V to 5.5 V

• LDO input (VIN2) 1.65 V to 5.5 V

• Buck output voltage range: 1.0 V to 3.3 V

• LDO output voltage range: 0.8 V to 3.3 V

• Buck output current: 600 mA

• LDO output current: 300 mA

• LDO quiescent current: 22 μA with zero load

• Buck quiescent current: 20 μA in PSM mode

• Low shutdown current: <0.3 μA

• Low LDO dropout 110 mV @ 300 mA load

• High LDO PSRR

• 65 dB @ 10 kHz at VOUT2= 1.2 V

• 55 dB @ 100 kHz at VOUT2= 1.2 V

• Low noise LDO: 40 μV rms at VOUT2= 1.2 V

• Initial accuracy: ±1%

• Current-limit and thermal overload protection

• Power-good indicator

• Optional enable sequencing

• 10-lead 0.75 mm × 3 mm × 3 mm LFCSP package

Description

The ADP2140 includes a high efficiency, low quiescent 600 mA stepdown dc-to-dc converter and a 300 mA LDO packaged in a small 10-lead 3 mm × 3 mm LFCSP. The total solution requires only four tiny external components.The buck regulator uses a proprietary high speed 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 ADP2140 has a power saving variable frequency mode to reduce switching frequency under light loads.The LDO is a low quiescent current, low dropout linear regulator designed to operate in a split supply mode with VIN2as low as 1.65 V. The low input voltage minimum allows the LDO to be powered from the output of the buck regulator increasing efficiency and reducing power dissipation. The ADP2140 runs from input voltages of 2.3 V to 5.5 V allowing single Li+/Li− polymer cell, multiple alkaline/NiMH cell, PCMCIA, and other standard power sources.ADP2140 includes a power-good pin, soft start, and internal compensation. Numerous power sequencing options are user-selectable through two enable inputs. In autosequencing mode, the highest voltage output enables on the rising edge of EN1. During logic controlled shutdown, the input disconnects from the output and draws less than 300 nA from the input source. Other key features include: undervoltage lockout to prevent deep battery discharge, soft start to prevent input current overshoot at startup, and both short-circuit protection and thermal overload protection circuits to prevent damage in adverse conditions.When the ADP2140 is used with two 0603 capacitors, one 0402 capacitor, one 0402 resistor, and one 0805 chip inductor, the total solution size is approximately 90 mm2resulting in the smallest footprint solution to meet a variety of portable applications.ApplicationsMobile phonesPersonal media playersDigital camera and audio devicesPortable and battery-powered equipment