Low Cost, Low Power, True RMS-to-DC Converter Features: Converts an ac voltage waveform to a dc voltage and then converts to the true rms, average rectified, or absolute value 200 mV rms full-scale input range (larger inputs with input attenuator) High input impedance: 1012 Ω  Low input bias current: 25 pA maximum High accuracy: ±0.3 mV ± 0.3% of reading RMS conversion with signal crest factors up to 5 Wide power supply range: +2.8 V, −3.2 V to ±16.5 V Low power: 200 μA maximum supply current Buffered voltage output No external trims needed for specified accuracy Related device: the AD737 features a power-down control with standby current of only 25 μA; the dc output voltage is negative and the output impedance is 8 kΩ

50 mA/500 mA, High Efficiency, Ultralow Power Step-Down Regulator Features: Input start-up voltage range: 2.15 V to 6.50 V Operates down to 2.00 V voltage Ultralow 180 nA quiescent current with no load Selectable output voltage of 1.2 V to 3.6V or 0.8V to 5.0V ±1.5% output accuracy over full temperature range in PWM mode Selectable hysteresis mode or PWM operation mode Output current Up to 50 mA in hysteresis mode Up to 500 mA in PWM mode VOUTOK flag monitors the output voltage 100% duty cycle operation mode 2 MHz switching frequency with optional synchronization input from 1.5 MHz to 2.5 MHz QOD option UVLO, OCP, and TSD protection 9-ball, 1.65 mm × 1.87 mm WLCSP −40°C to +125°C junction temperature

Ultralow Power Step-Down Regulator with Input Voltage Monitor and Regulation Features: Input start-up voltage range: 2.15 V to 6.50 V  Operation down to 2.00 V  Ultralow, 260 nA quiescent current with no load Selective output voltage from 1.2 V to 3.6 V (or 0.8 V to 5.0 V) ±2.5% output accuracy over the full temperature range Selectable hysteresis or pulse-width modulation (PWM) operation mode Output current up to 50 mA in hysteresis mode VINOK flag to monitor the input voltage Ultrafast stop switching control 100% duty cycle operation mode Quick output discharge (QOD) option Undervoltage lockout (UVLO), OCP, and thermal shutdown (TSD) protection 10-lead, 3 mm × 3 mm LFCSP package −40°C to +125°C operating junction temperature range

Ultralow Power Step-Down Regulator with Input Voltage Monitor and Regulation Features: Input start-up voltage range: 2.15 V to 6.50 V  Operation down to 2.00 V  Ultralow, 260 nA quiescent current with no load Selective output voltage from 1.2 V to 3.6 V (or 0.8 V to 5.0 V) ±2.5% output accuracy over the full temperature range Selectable hysteresis or pulse-width modulation (PWM) operation mode Output current up to 50 mA in hysteresis mode VINOK flag to monitor the input voltage Ultrafast stop switching control 100% duty cycle operation mode Quick output discharge (QOD) option Undervoltage lockout (UVLO), OCP, and thermal shutdown (TSD) protection 10-lead, 3 mm × 3 mm LFCSP package −40°C to +125°C operating junction temperature range

Advanced Battery Management PMIC with Inductive Boost LED and Three LDO Regulators Features: Switching mode USB battery charger High accuracy and programmable charge terminal voltage and charge current 3 MHz buck for high efficiency and small footprint Tolerant input voltage from −0.5 V to +20 V (USB VVBUSx) Power path control allows system to operate with dead or missing battery Compliant with JEITA charge temperature specification Voltage-based state of charge (SOC) calculation algorithm Extra low quiescent current in sleep mode Battery impedance chemistry (Li-Ion) compensation Battery temperature compensation No need for external sense resistor Boost regulator with 5-channel LED driver Support up to 4 LED in series or in parallel 5 independent programmable LED current sinks 64 programmable LED current levels (up to 20 mA) Programmable on and off timer for LED blinking Adaptive headroom control to maximize the efficiency Three 150 mA linear LDO regulators Ultralow IQ with zero load at 1 μA typical for LDO1 Optional load-switch full turn-on mode Full I2C programmability with dedicated interrupt pin

40 V, 200 mA, Low Noise, CMOS LDO Linear Regulator Features: Low noise: 11 μV rms independent of fixed output voltage PSRR of 88 dB at 10 kHz, 68 dB at 100 kHz, 50 dB at 1 MHz, VOUT ≤ 5 V, VIN = 7 V Input voltage range: 2.7 V to 40 V Maximum output current: 200 mA Initial accuracy: ±0.8% Accuracy over line, load, and temperature −1.2% to +1.5%, TJ = −40°C to +85°C ±1.8%, TJ = −40°C to +125°C Low dropout voltage: 200 mV (typical) at a 200 mA load, VOUT = 5 V User programmable soft start (LFCSP and SOIC only) Low quiescent current, IGND = 50 μA (typical) with no load Low shutdown current: 1.8 μA at VIN = 6 V, 3.0 μA at VIN = 40 V Stable with a small 2.2 μF ceramic output capacitor Fixed output voltage options: 1.8 V, 2.5 V, 3.3 V, 3.8 V, and 5.0 V 15 standard voltages between 1.2 V and 5.0 V are available Adjustable output from 1.2 V to VIN – VDO, output can be adjusted above initial set point Precision enable 2 mm × 2 mm, 6-lead LFCSP, 8-Lead SOIC, 5-Lead TSOT AEC-Q100 qualified for automotive applications

Ultralow Noise, LDO XFET 2.5V Voltage Reference w/Current Sink and Source Features: Ultralow noise (0.1 Hz to 10 Hz) ADR440: 1 μV p-p ADR441: 1.2 μV p-p ADR443: 1.4 μV p-p ADR444: 1.8 μV p-p ADR445: 2.25 μV p-p Superb temperature coefficient A Grade: 10 ppm/°C B Grade: 3 ppm/°C Low dropout operation (supply voltage headroom): 500 mV Input range: (VOUT + 500 mV) to 18 V High output source and sink current +10 mA and −5 mA, respectively Wide temperature range: −40°C to +125°CADR441-EP supports defense and aerospace applications (AQEC standard) Download ADR441-EP Data Sheet (pdf) Military temperature range (−55°C to +125°C) Controlled manufacturing baseline 1 assembly/test site 1 fabrication site Product change notification Qualification data available on request V62/18620 DSCC Drawing Number

Ultra-Low-Noise, High-Accuracy 2.5V Voltage Reference Features: Maximum temperature coefficient (TCVOUT): 0.8 ppm/°C (D grade 0°C to 70°C) 1 ppm/°C (C grade 0°C to 70°C) 2 ppm/°C (B grade −40°C to +125°C) 4 ppm/°C (A grade 40°C to +125°C) Output noise (0.1 Hz to 10 Hz): 1 μV p-p at VOUT of 2.048 V typical Initial output voltage error: B, C, D grade: ±0.02% (maximum) Input voltage range: 3 V to 15 V Operating temperature: A grade and B grade: −40°C to +125°C C grade: 0°C to +70°C Output current: +10 mA source/−10 mA sink Low quiescent current: 950 μA (maximum) Low dropout voltage: 300 mV at 2 mA (VOUT ≥ 3 V) 8-lead SOIC package and LCC package AEC-Q100 qualified for automotive applications Long-term drift: 8 ppm typical at 4500 hours

Ultra-Low-Noise, High-Accuracy 4.096V Voltage Reference Features: Maximum temperature coefficient (TCVOUT): 0.8 ppm/°C (D grade 0°C to 70°C) 1 ppm/°C (C grade 0°C to 70°C) 2 ppm/°C (B grade −40°C to +125°C) 4 ppm/°C (A grade 40°C to +125°C) Output noise (0.1 Hz to 10 Hz): 1 μV p-p at VOUT of 2.048 V typical Initial output voltage error: B, C, D grade: ±0.02% (maximum) Input voltage range: 3 V to 15 V Operating temperature: A grade and B grade: −40°C to +125°C C grade: 0°C to +70°C Output current: +10 mA source/−10 mA sink Low quiescent current: 950 μA (maximum) Low dropout voltage: 300 mV at 2 mA (VOUT ≥ 3 V) 8-lead SOIC package and LCC package AEC-Q100 qualified for automotive applications Long-term drift: 8 ppm typical at 4500 hours

Ultra-Low-Noise, High-Accuracy 4.096V Voltage Reference Features: Maximum temperature coefficient (TCVOUT): 0.8 ppm/°C (D grade 0°C to 70°C) 1 ppm/°C (C grade 0°C to 70°C) 2 ppm/°C (B grade −40°C to +125°C) 4 ppm/°C (A grade 40°C to +125°C) Output noise (0.1 Hz to 10 Hz): 1 μV p-p at VOUT of 2.048 V typical Initial output voltage error: B, C, D grade: ±0.02% (maximum) Input voltage range: 3 V to 15 V Operating temperature: A grade and B grade: −40°C to +125°C C grade: 0°C to +70°C Output current: +10 mA source/−10 mA sink Low quiescent current: 950 μA (maximum) Low dropout voltage: 300 mV at 2 mA (VOUT ≥ 3 V) 8-lead SOIC package and LCC package AEC-Q100 qualified for automotive applications Long-term drift: 8 ppm typical at 4500 hours