Specifications
| Type | Description |
|---|---|
| Part Number | BQ40Z50 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Component Type | Power_IC |
| Package / Case | 32-pin VQFN (RSM), 4.00 mm x 4.00 mm nominal body, exposed thermal pad |
| Supported Cell Configuration | 1-series, 2-series, 3-series, and 4-series; Li-Ion or Li-Polymer battery packs |
| Battery Chemistry | Li-Ion and Li-Polymer; pack-based battery management |
| Gas Gauging Technology | Impedance Track; available charge measurement |
| Host Interface | Two-wire SMBus v1.1 compatible interface; communication with system host controller |
| Protection FET Drive Type | High-side N-channel protection FET drive; charge and discharge FET control |
| Authentication | SHA-1 authentication; includes secure memory for authentication keys |
| Cell Balancing | Integrated cell balancing; while charging or at rest |
| Supported Power Feature | TURBO BOOST mode; provides available max power and max current to host system |
| Battery Trip Point Support | Supported; BTP interrupt at preset state-of-charge thresholds |
| Programmable Protection Features | Voltage, current, temperature, charge timeout, CHG/DSG FETs, AFE; battery pack protection |
| Safety Protection Levels | Software-based 1st-level and 2nd-level protection; overvoltage, undervoltage, overcurrent, short-circuit current, overload, overtemperature, and other pack/cell faults |
| Supply Voltage Range | 2.2 V min, 26 V max; BAT, VCC, PBI; recommended operating conditions, TA=-40°C to 85°C |
| Shutdown Voltage | 1.8 V min, 2.0 V typ, 2.2 V max; VPACK < VSHUTDOWN- |
| Start-up Voltage | 2.05 V min, 2.25 V typ, 2.45 V max; VPACK > VSHUTDOWN+ = VSHUTDOWN- + VHYS |
| Shutdown Voltage Hysteresis | 250 mV typ; VSHUTDOWN+ - VSHUTDOWN- |
| Recommended Input Voltage Range | 26 V max; PACK, SMBC, SMBD, PRES, BTP_IN, DISP |
| Recommended Thermistor Input Voltage Range | VREG max; TS1, TS2, TS3, TS4 |
| Recommended PTC and LED Control Voltage Range | VBAT max; PTC, PTCEN, LEDCNTLA, LEDCNTLB, LEDCNTLC |
| Recommended Sense Resistor Input Voltage Range | -0.2 V min, 0.2 V max; SRP, SRN |
| Recommended VC4 Input Voltage Range | VC3 min, VC3 + 5 V max; VC4 cell voltage sense input |
| Absolute Maximum Supply Voltage | -0.3 V min, 30 V max; BAT, VCC, PBI |
| Absolute Maximum PACK and Digital Pin Voltage | -0.3 V min, 30 V max; PACK, SMBC, SMBD, PRES or SHUTDN, BTP_INT, DISP |
| Absolute Maximum Thermistor Pin Voltage | -0.3 V min, VREG + 0.3 V max; TS1, TS2, TS3, TS4 |
| Absolute Maximum PTC and LED Control Pin Voltage | -0.3 V min, VBAT + 0.3 V max; PTC, PTCEN, LEDCNTLA, LEDCNTLB, LEDCNTLC |
| Absolute Maximum Current Sense Pin Voltage | -0.3 V min, 0.3 V max; SRP, SRN |
| Absolute Maximum VC4 Input Voltage | VC3 - 0.3 V min; VC3 + 8.5 V or VSS + 30 V max |
| Absolute Maximum VC3 Input Voltage | VC2 - 0.3 V min; VC2 + 8.5 V or VSS + 30 V max |
| Absolute Maximum VC2 Input Voltage | VC1 - 0.3 V min; VC1 + 8.5 V or VSS + 30 V max |
| Absolute Maximum VC1 Input Voltage | VSS - 0.3 V min; VSS + 8.5 V or VSS + 30 V max |
| Absolute Maximum CHG and DSG Output Voltage | -0.3 V min, 32 V max; CHG, DSG output voltage range |
| Absolute Maximum PCHG and FUSE Output Voltage | -0.3 V min, 30 V max; PCHG, FUSE output voltage range |
| Maximum VSS Current | 50 mA max; absolute maximum rating |
| Storage Temperature | -65°C min, 150°C max; absolute maximum rating |
| Lead Temperature | 300°C max; soldering, 10 s |
| ESD Rating HBM | ±2000 V; human-body model per ANSI/ESDA/JEDEC JS-001 |
| ESD Rating CDM | ±500 V; charged-device model per JEDEC JESD22-C101 |
| Datasheet Status | request_only |
Product Overview
BQ40Z50 is a Texas Instruments Power_Management IC for Li-Ion and Li-Polymer battery pack management. It is specified for 1-series, 2-series, 3-series, and 4-series pack configurations and uses Impedance Track technology for charge measurement. Host communication is through a two-wire SMBus v1.1 compatible interface.
The device drives high-side N-channel charge and discharge protection FETs and includes integrated cell balancing while charging or at rest. Protection functions cover voltage, current, temperature, charge timeout, CHG and DSG FETs, and AFE-related faults, with software-based first-level and second-level protection for pack and cell fault handling.
BQ40Z50 is packaged in a 32-pin VQFN (RSM) with a 4.00 mm x 4.00 mm nominal body and exposed thermal pad. Recommended BAT, VCC, and PBI operation is 2.2 V to 26 V over TA = -40°C to 85°C, with absolute maximum supply ratings from -0.3 V to 30 V.
Key Features
- Supports 1-series through 4-series battery packs
- Compatible with Li-Ion and Li-Polymer chemistries
- Uses Impedance Track gas gauging technology
- Two-wire SMBus v1.1 compatible host interface
- High-side N-channel charge and discharge FET drive
- Integrated cell balancing while charging or at rest
- SHA-1 authentication with secure key memory
- TURBO BOOST reports available max power and current
- Battery trip point interrupt at state-of-charge thresholds
- Programmable voltage, current, temperature, timeout, FET, and AFE protection
Typical Applications
- Li-Ion battery packs
- Li-Polymer battery packs
- 1-series pack management
- 2-series pack management
- 3-series pack management
- 4-series pack management
- SMBus host-controlled battery systems
- Battery packs requiring SHA-1 authentication
- Battery packs with cell balancing
Procurement Notes
When requesting a quote for BQ40Z50, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For power IC and power device sourcing, voltage rating, current rating, power dissipation, package thermal performance, protection features, qualification grade and application conditions should be reviewed before approval.
FAQ
What battery configurations does BQ40Z50 support?
BQ40Z50 supports 1-series, 2-series, 3-series, and 4-series Li-Ion or Li-Polymer battery packs. It is described as a pack-based battery manager for these supported cell configurations.
Which host interface is used by BQ40Z50?
BQ40Z50 communicates with the system host controller through a two-wire SMBus v1.1 compatible interface. The extracted facts identify this interface specifically for host communication.
What protection functions are included in BQ40Z50?
BQ40Z50 includes programmable protection for voltage, current, temperature, charge timeout, CHG and DSG FETs, and AFE functions. It also supports software-based first-level and second-level protection for pack and cell faults.
What package is specified for BQ40Z50?
BQ40Z50 is supplied in a 32-pin VQFN (RSM) package with a 4.00 mm x 4.00 mm nominal body and an exposed thermal pad.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.