The ADP2138 and ADP2139 are high efficiency, low quiescent current, synchronous step-down dc-to-dc converters. The ADP2139 has the additional feature of an internal discharge switch. The total solution requires only three tiny external components. When the MODE pin is set high, the buck regulator operates in forced PWM mode, which provides low peak-to-peak ripple for power supply noise sensitive loads at the expense of light load efficiency. When the MODE pin is set low, the buck regulator automatically switches operating modes, depending on the load current level. At higher output loads, the buck regulator operates in PWM mode. When the load current falls below a predefined threshold, the regulator operates in power save mode (PSM), improving light load efficiency.The ADP2138/ADP2139 operate on input voltages of 2.3 V to 5.5 V, which allows for single lithium or lithium polymer cell, multiple alkaline or NiMH cell, PCMCIA, USB, and other standard power sources. The maximum load current of 800 mA is achievable across the input voltage range.The ADP2138/ADP2139 are available in fixed output voltages of 3.3 V, 3.0 V, 2.8 V, 2.5 V, 1.8 V, 1.5 V, 1.2 V, 1.0 V, and 0.8 V. All versions include an internal power switch and synchronous rectifier for minimal external part count and high efficiency. The ADP2138/ADP2139 have internal soft start and they are internally compensated. During logic controlled shutdown, the input is disconnected from the output and the ADP2138/ADP2139 draw 0.2 ?A (typical) from the input source.Other key features include undervoltage lockout to prevent deep battery discharge, and soft start to prevent input current overshoot at startup. The ADP2138/ADP2139 are available in a 6-ball wafer level chip scale package (WLCSP).Applications PDAs and palmtop computers Wireless handsets Digital audio, portable media players Digital cameras, GPS navigation units

SUPERVISOR CIRCUIT MPU #1 SOT-23-5; Threshold Voltage:4.5V; No. of Supervisors / Monitors:1Monitors; Supply Voltage Min:1V; Supply Voltage Max:5.5V; Reset Type:Manual Active-Low; Digital IC Case:SOT-23; No. of Pins:5Pins; Delay Time:-; Operating Temperature Min:-40°C; Operating Temperature Max:85°C; Packaging:Cut Tape; Product Range:ADM6320 Series; Automotive Qualification Standard:-; MSL:MSL 1 - Unlimited; SVHC:No SVHC (20-Jun-2016)

SEQUENCER FET DRIVE #2 SOT-23-6; Threshold Voltage:618mV; No. of Supervisors / Monitors:2; Supply Voltage Min:900mV; Supply Voltage Max:5.5V; Reset Type:Active-High; Digital IC Case:SOT-23; No. of Pins:6; Delay Time:300ms; ;RoHS Compliant: Yes

SUPERVISOR CIRCUIT MPU #1 SOT-143-4; Threshold Voltage:3.08V; No. of Supervisors / Monitors:1Monitors; Supply Voltage Min:3.15V; Supply Voltage Max:3.6V; Reset Type:Manual Active-Low; Digital IC Case:SOT-143; No. of Pins:4Pins; Delay Time:-; Operating Temperature Min:-40°C; Operating Temperature Max:85°C; Packaging:Cut Tape; Product Range:ADM811 Series; Automotive Qualification Standard:-; MSL:MSL 1 - Unlimited; SVHC:No SVHC (20-Jun-2016)

LOAD SWITCH 5.5V 3A HI SIDE 6WLCSP; Power Load Switch Type:High Side; Input Voltage:5.5V; Current Limit:4A; On State Resistance:0.01ohm; Distribution Switch Case Style:WLCSP; No. of Pins:6Pins; Thermal Protection:Yes; On / Enable Input Polarity:Active High; No. of Outputs:1Outputs; Operating Temperature Min:-40°C; Operating Temperature Max:85°C; Packaging:Each; Product Range:ADP196 Series; Automotive Qualification Standard:-; MSL:MSL 1 - Unlimited; SVHC:No SVHC (20-Jun-2016); Operating Temperature Range:-40°C to +85°C

0.5A Hi PSRR FT LDO 1.8Vo

IC VOLT REGULATOR FIXED +3V BIPOLAR TSOP 6PIN PLASTIC

12V uPMU Multi-channel Power Solution

20 V, 500 mA, Low Noise, CMOS LDO Features: Input voltage range: 3.3 V to 20 V Maximum output current: 500 mA Low Noise: 15 μV rms for fixed output versions PSRR Performance of 60 dB at 10 kHz, VOUT = 3.3 V Reverse current protection Low dropout voltage: 350 mV at 500 mA Initial accuracy: ±0.8% Accuracy over line, load, and temperature −2% to +1%, TJ = −40°C to +125°C −1.25% to +1%, TJ = 0°C to +85°C Low quiescent current (VIN = 5 V), IGND = 900 μA with 500 mA load Low shutdown current: <40 μA at VIN = 12 V, stable with small 1 μF ceramic output capacitor 7 fixed output voltage options: 1.5 V, 1.8 V, 2.5 V, 3 V, 3.3 V, 5 V, and 9 V Adjustable output from 1.22 V to VIN − VDO Foldback current limit and thermal overload protection User programmable precision UVLO/enable Power-good indicator 8-lead LFCSP and 8-lead SOIC packages

Demonstration Circuit 2048A is a nanopower buckboost DC/DC with energy harvesting battery life extender featuring the LTC3330. The LTC3330 integrates a high voltage energy harvesting power supply plus a DC/DC converter powered by a primary cell battery to create a single output supply for alternative energy applications. The energy harvesting power supply, consisting of an integrated low-loss full-wave bridge with a high voltage buck converter, harvests energy from piezoelectric, solar or magnetic sources. The primary cell input powers a buck-boost converter capable of operating down to 1.8V at its input. Either DC/DC converter can deliver energy to a single output.