# ADP2291ARMZ-R7

**Analog Devices** · Global Sourcing Parts · MSOP-8

ADP2291ARMZ-R7 from Analog Devices, in a MSOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | DRV | output | Base driver output that controls the base of an external PNP pass transistor, with a maximum base drive current of 40 mA; pulling DRV below ground while VIN is applied can cause permanent damage. |
| 2 | GND | power_in | Ground reference for the device, to which all voltages not otherwise specified are referenced. |
| 3 | BAT | input | Battery voltage sense input that sets the end-of-charge voltage of 4.2 V, specified at 4.158 V to 4.242 V over 0°C to +50°C, and that has a 5 V overshoot protection threshold. |
| 4 | CS | input | Current sense resistor negative input, where the sense voltage VRS = VIN - VCS is regulated to 150 mV nominal in fast charge (adjustable down to 50 mV with ADJ). |
| 5 | ADJ | input | Charging current adjust and charger shutdown input, internally pulled up through 100 kΩ to 3 V, where pulling it below 0.4 V puts the charger into shutdown mode. |
| 6 | IN | power_in | Power input and current sense resistor positive input, operating over a 4.5 V to 12 V input range with an absolute maximum rating of -0.3 V to +13.5 V. |
| 7 | TIMER | input | Timer programming input, where an external capacitor CTIMER sets the charge timeouts and connecting TIMER to ground disables the timers. |
| 8 | CHG | output | LED charge status indicator implemented as an open-collector output that sinks current while charging, with a low output voltage of 0.45 V at 20 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | MSOP-8 |
| Category | Global Sourcing Parts |
| Pins | 8 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input voltage |  | 4.5 |  | 12 | V |  | 3 |
| Voltage accuracy, end-of-charge | VBAT, EOC | 4.158 | 4.2 | 4.242 | V | TA = 0°C to +50°C; VIN = 4.5 V to 12 V; VIN, VCS = VRS/10 | 3 |
| Current draw, fast charge/precharge/end-of-charge modes | IIN |  | 6 | 9 | mA | Fast charge/precharge/end-of-charge modes | 3 |
| Current draw, timeout/shutdown/battery fault | IIN |  | 1.4 | 1.8 | mA | Timeout/shutdown/battery fault | 3 |
| Current draw, battery fault/shutdown mode |  |  | 0.1 | 1 | µA | VIN = 4.5 V to 12 V | 3 |
| Sense voltage setpoint (fast charge), RADJ open | VRS | 140 | 150 | 160 | mV | VIN, VCS, RADJ = open; VIN = 4.5 V to 12 V; VBAT = 3.6 V | 3 |
| Sense voltage setpoint (fast charge), RADJ = 100 kΩ | VRS | 40 | 50 | 60 | mV | VIN, VCS, RADJ = 100 kΩ; VIN = 4.5 V to 12 V; VBAT = 3.6 V | 3 |
| Sense voltage setpoint (precharge), RADJ open | VRS | 10 | 15 | 20 | mV | VIN, VCS, RADJ = open; VIN = 4.5 V to 12 V; VBAT = 2 V | 3 |
| Sense voltage setpoint (precharge), RADJ = 100 kΩ | VRS | 5 | 10 | 15 | mV | VIN, VCS, RADJ = 100 kΩ; VIN = 4.5 V to 12 V; VBAT = 2 V | 3 |
| BAT precharge threshold | VBAT | 2.65 |  | 2.85 | V | VBAT rising | 3 |
| ADJ shutdown threshold | VADJ | 0.3 |  | 0.45 | V | VADJ falling, VIN = 4.5 V | 3 |
| VIN power-down threshold | VIN | 3.6 |  | 4 | V | VIN rising | 3 |
| VIN_Good comparator threshold (VIN > VBAT) |  | 125 | 170 | 220 | mV | VIN rising | 3 |
| EOC comparator current threshold, RADJ open | VIN, VCS | 7 | 10 | 13 | % | VIN, VCS falling, RADJ = open, relative to VRS | 3 |
| EOC comparator current threshold, RADJ = 100 kΩ | VIN, VCS | 6 | 10 | 16 | % | VIN, VCS falling, RADJ = 100 kΩ, relative to VRS | 3 |
| Charge/discharge timer current |  | 21 | 24 | 27 | µA |  | 4 |
| High-low threshold delta |  | 750 |  | 850 | mV | Guaranteed by design; not tested in production | 4 |
| Overshoot protection BAT threshold | BAT | 4.7 | 5 | 5.3 | V |  | 4 |
| CHG output leakage current | ICHG |  | 0.1 | 1 | µA | VCHG = 5 V | 4 |
| IN, DRV, CS, CHG voltage range |  | -0.3 |  | 13.5 | V | to GND | 5 |
| BAT, ADJ, TIMER voltage range |  | -0.3 |  |  | V | to GND; upper limit printed as (VIN + 0.3 V), not a numeric value | 5 |
| Operating ambient temperature | TA | -40 |  | 85 | °C |  | 5 |
| Operating junction temperature | TJ | -40 |  | 125 | °C |  | 5 |
| Storage temperature range |  | -65 |  | 150 | °C |  | 5 |
| Lead temperature soldering |  |  |  | 300 | °C | 10 sec | 5 |
| Thermal resistance, junction-to-ambient, 2-layer MSOP-8 | θJA |  | 220 |  | ºC/W | 2-layer MSOP-8 | 5 |
| Thermal resistance, junction-to-ambient, 4-layer MSOP-8 | θJA |  | 158 |  | ºC/W | 4-layer MSOP-8 | 5 |

## CAD (KiCad official)

- Symbol: `ADP2291ARMZ-R7`
- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`
- 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files: `adp2291armz-r7-etched.step` / `adp2291armz-r7-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `adp2291armz-r7.step` / `adp2291armz-r7.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Analog Devices datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589836892700246016) (20 pp, sha256 `eb2775301cc432ce`, retrieved 2026-10-21, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/adp2291armz-r7-datasheet.pdf)