Analog Devices Inc. ADP5350ACPZ-1-R7

Overview

ADP5350ACPZ-1-R7 from Analog Devices is an advanced battery management PMIC integrating a 3 MHz buck charger, fuel gauge, 1.5 MHz boost LED driver with five independent current sinks (up to 20 mA each), and three 150 mA LDO regulators. It supports Li-Ion/Li-Poly battery charging with JEITA-compliant temperature regulation, voltage-based SOC estimation, and power-path control for system operation with dead batteries - used in wearable medical monitors and portable instrumentation.

For engineers reviewing the ADP5350ACPZ-1-R7 datasheet, ADP5350ACPZ-1-R7 pinout, ADP5350ACPZ-1-R7 application, or ADP5350ACPZ-1-R7 equivalent, this device delivers programmable charge termination (4.200 V ±0.3%), ultra-low quiescent current (1 µA typical for LDO1 at zero load), I²C-configurable LED blinking timers, adaptive headroom control for LED efficiency, and thermal shutdown at 140°C - critical for space-constrained, battery-sensitive designs.

Technical Context

The ADP5350ACPZ-1-R7 implements a dual-path power architecture: its 3 MHz buck regulator handles USB-input battery charging with internal FETs (RDSON_P = 280 mΩ, RDSON_N = 210 mΩ), while the 1.5 MHz boost converter supplies up to 16 V to drive LEDs in series or parallel configurations. The integrated 12-bit ADC enables voltage-based fuel gauge functionality with ±30 mV accuracy across −40°C to +85°C.

All regulation, timing, and protection functions-including JEITA thermistor thresholds (e.g., RCOOL_COLD = 151.2 kΩ), charge current (25–650 mA), and LED current levels (64 programmable steps)-are controlled via a 400 kHz I²C interface with dedicated interrupt (INT) and power-good (PGOOD) outputs. The device operates across −40°C to +125°C junction temperature and supports both LFCSP and WLCSP packages.

Key Specifications

Pinout & Package

The ADP5350ACPZ-1-R7 is housed in a 32-lead, 5 mm × 5 mm LFCSP package (CP-32-121), thermally optimized with θJA = 42°C/W and exposed paddle for PCB heat sinking. Pin functions are validated per Analog Devices Rev. B datasheet Figure 4 and Table 9.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar battery management PMIC applications.

Compared with BQ25895RTWR and MAX77818EWJ+T, the ADP5350ACPZ-1-R7 uniquely integrates fuel gauge, 5-channel LED driver, and JEITA thermistor support in one die - eliminating four external ICs in wearable medical designs while maintaining full I²C configurability and <1 µA LDO quiescent current.

Availability

ADP5350ACPZ-1-R7 is available at Aetrix Electronics and suitable for wearable health monitors, portable medical ultrasound systems, and industrial handheld scanners requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for ADP5350ACPZ-1-R7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide and over 50 years of precision power management innovation.

The ADP5350ACPZ-1-R7 belongs to Analog Devices' advanced battery management PMIC product line, engineered specifically for ultra-low-power, multi-rail portable medical and wearable devices demanding integrated charging, fuel gauging, LED control, and thermal safety compliance.

FAQ

What is the maximum LED forward voltage supported by the ADP5350ACPZ-1-R7 boost regulator?

The ADP5350ACPZ-1-R7 boost regulator supports up to 16 V output (VOUT4), enabling it to drive up to four white LEDs in series (typically 3.2 V each) or five LEDs in parallel configurations. Its programmable overvoltage protection thresholds - 5.6 V, 10 V, 15 V, and 18.5 V - allow safe operation across diverse LED types without external clamping circuitry. This capability is confirmed in Table 3 of the Rev. B datasheet under "Output Voltage Range" and "Overvoltage Threshold" specifications.

Does the ADP5350ACPZ-1-R7 require an external current-sense resistor for battery charging?

No, the ADP5350ACPZ-1-R7 does not require an external current-sense resistor for battery charging. Its charge current (ICHG) is programmable via I²C and measured internally using MOSFET R_DS(ON) sensing - explicitly stated in the Features section as "No need for external sense resistor." This eliminates board space, cost, and accuracy drift associated with discrete shunts, and is validated across charge currents from 25 mA to 650 mA in Table 1.

How does the ADP5350ACPZ-1-R7 implement JEITA-compliant battery charging?

The ADP5350ACPZ-1-R7 implements JEITA compliance through its dedicated THR pin, which interfaces with a standard NTC thermistor (RNTC = 47 kΩ, BETA = 3800). Internal comparators monitor resistance thresholds corresponding to battery temperature zones (e.g., RCOLD_COOL = 145.6 kΩ for cold-to-cool transition), automatically scaling charge current per JEITA guidelines. This behavior is fully documented in Table 1's "Thermistor Control" section and Figure 2's functional block diagram.

Can the ADP5350ACPZ-1-R7 operate without a battery connected?

Yes, the ADP5350ACPZ-1-R7 supports battery-less operation via its power-path architecture. When no battery is present or BSNS reads below VTRK_DEAD (2.5 V), the internal isolation FET connects ISOB directly to ISOS, allowing the system to be powered from USB input (VBUSA/VBUSB) while bypassing the charger. This is confirmed in the General Description ("Power path control allows system to operate with dead or missing battery") and Figure 1's typical application circuit.

What is the minimum input voltage required for the ADP5350ACPZ-1-R7 buck charger to start operation?

The ADP5350ACPZ-1-R7 buck charger initiates operation when the BSNS pin voltage exceeds the rising undervoltage lockout threshold of 2.6 V (typical), as specified in Table 1 under "Undervoltage Lockout." This corresponds to a minimum detectable battery voltage of 2.6 V, enabling reliable trickle-charge recovery from deeply discharged Li-Ion cells down to ~2.4 V - verified across temperature ranges and confirmed in the "Battery Detection" and "Charger Modes" sections of the datasheet.