Mfr Part #:

BQ27520YZFT-G4

The Texas Instruments BQ27520YZFT-G4 is a system-side fuel gauge IC for single-cell Li-ion batteries. It utilizes Impedance Track technology for accurate state-of-charge reporting.

✓ Total Stock: 24,591 pcs

$ Price Range: $2.56

BQ27520YZFT-G4 Available from 5 distributors

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Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Romaks Technologies ✓ Non-Authorised Inventory information	23,179 pcs On Request	23179 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request
Unit Electronics Co.,Limited ✓ Non-Authorised Inventory information	938 pcs On Request	938 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request
Optech Co.,Limited ✓ Non-Authorised Inventory information	318 pcs On Request	318 pcs	On Request	1	On Request	On Request	1319+	On Request	On Request
Smaxon Electronics ✓ Non-Authorised Inventory information	152 pcs On Request	152 pcs	On Request	1	On Request	On Request	1540+	On Request	On Request
MW.FEP S.p.A. ✓ Non-Authorised Inventory information	4 pcs On Request	4 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

BQ27520YZFT-G4 Specifications Quick View

Most important parameters for selection – full specs in datasheet.

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Category	New Products
Manufacturer Name	Texas Instruments
Mounting Type	Surface Mount
Operating Temperature Range	-40 to 85
Pitch	0.5 mm
Tape & Reel	Yes

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BQ27520YZFT-G4 Description

Short technical summary and product information.

The Texas Instruments BQ27520YZFT-G4 is a system-side fuel gauge IC designed for single-cell Li-ion battery packs. This device integrates patented Impedance Track technology, which accurately reports remaining capacity, state-of-charge (SOC), and time-to-empty by adjusting for battery aging, self-discharge, temperature, and rate changes.

Key features include an integrated 2.5 VDC LDO and support for an external low-value 10-mΩ sense resistor. The fuel gauge resides on the system board and requires minimal firmware development. It supports embedded or removable packs with capacities up to 14500 mAh and can accommodate pack swapping with two separate battery profiles.

The BQ27520YZFT-G4 communicates via a 400-kHz I²C serial interface and includes 32 bytes of scratch-pad FLASH NVM. It offers configurable SOC interrupts and multiple temperature sensing options, including an external thermistor, internal sensor, or host-reported temperature.

This IC is housed in a compact 15-pin, 2.610 x 1.956 mm NanoFree™ (DSBGA) package with a 0.5 mm pitch, suitable for surface-mount applications. The operating temperature range is -40°C to 85°C. It is supplied in a 3000-piece reel.

BQ27520YZFT-G4 Quick Information

Product Type: Battery Fuel Gauge IC

Series: Impedance Track

Canonical Name: BQ27520-G4 System-Side Impedance Track Fuel Gauge With Integrated LDO

Subcategory: Battery Management ICs

BQ27520YZFT-G4 Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

BQ27520YZFT-G4 Estimated Pricing

Qty	Low	High
1+	$2.56	$2.56

Estimated market price range - modelled values for guidance only, not live distributor offers.

BQ27520YZFT-G4 Features

System-side Li-ion battery fuel gauge.
Patented Impedance Track technology.
Integrated 2.5 VDC LDO.
15-pin NanoFree DSBGA package.
Operates from -40 to 85°C.

BQ27520YZFT-G4 Applications

Accurate battery state-of-charge reporting.
Battery aging and self-discharge compensation.
Supports embedded or removable battery packs.
Ideal for portable electronics.
Power management systems.

BQ27520YZFT-G4 FAQs

6 frequently asked questions generated from this part’s specifications.

What is the operating temperature range of the BQ27520YZFT-G4?

-40 to 85 °C.

What is the supply voltage of the BQ27520YZFT-G4?

2.5 VDC (integrated LDO).

What package does the BQ27520YZFT-G4 come in?

15-pin DSBGA (YZF) with 0.5 mm pitch, surface mount.

What is the I2C clock speed of the BQ27520YZFT-G4?

400 kHz.

How much non-volatile memory does the BQ27520YZFT-G4 have?

32 bytes of scratch-pad FLASH NVM.

What is the maximum battery pack capacity supported by the BQ27520YZFT-G4?

Up to 14500 mAh.