Texas Instruments

BQ24133RGYR - 2.5A Sync Buck Battery Charger | Texas Instruments

Name: BQ24133RGYR
Brand: Texas Instruments
Price: 2.19 USD
Availability: InStock

MPN: BQ24133RGYR ✓ Active

In Stock Ships in 1-3 business days

4.5 V to 17 V Vdss 2.5 A Id VQFN-24 (RGY) 5.5x3.5 mm Package 1.6 MHz Speed

From $2.19 USD / Unit

MOQ: 1 |

Price updated: 2026-08-23

Volume Pricing

Qty	Unit Price	Extended
1	$3.42	$3.42
10	$3.08	$30.80
100	$2.74	$274.00
500	$2.47	$1,235.00
1,000	$2.19	$2,190.00

ℹ️ All prices are in USD

View Datasheet (PDF) View Alternatives

Quantity

Drop-in alternatives for BQ24133RGYR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.

Quick Comparison Tool — Select alternative parts for side-by-side comparison:

BQ24133RGYT

✅ Drop-In

📦 VQFN-24 (RGY)

Same die and package, different reel quantity (250 vs 3000)

📋 Reference alternative (not in catalog)

BQ24130RGYR

✅ Drop-In

📦 VQFN-24 (RGY)

Lower max charge current (2A vs 2.5A), no power path

📋 Reference alternative (not in catalog)

BQ24133RGYR-Q1

✅ Drop-In

📦 VQFN-24 (RGY)

Automotive grade (AEC-Q100), same electrical specs

📋 Reference alternative (not in catalog)

BQ24133RGYR

✅ Drop-In

Texas Instruments

📦 VQFN-24 (RGY)

Li-Ion, Li-Polymer · 1-3 · 2.5 A · 4.5 V to 17 V · 1.6 MHz · ±1% · External Power Path Selector · 2 N-channel

✓ In Stock

$2.19 / Unit

View Datasheet →

BQ24133RGYR

✅ Drop-In

Texas Instruments

📦 VQFN-24 (RGY)

Li-Ion, Li-Polymer · 1-3 · 2.5 A · 4.5 V to 17 V · 1.6 MHz · ±1% · External Power Path Selector · 2 N-channel

✓ In Stock

$2.19 / Unit

View Datasheet →

BQ24133RGYR Maximum Ratings & Electrical Characteristics

Battery Chemistry	Li-Ion, Li-Polymer
Number of Cells	1-3
Maximum Charge Current	2.5 A
Input Voltage Range	4.5 V to 17 V
Switching Frequency	1.6 MHz
Charge Voltage Accuracy	±1%
Power Path	External Power Path Selector
Integrated MOSFETs	2 N-channel
Operating Temperature Range	-40°C to +85°C
Package	VQFN-24 (RGY) 5.5x3.5 mm
Mounting Type	Surface Mount
Battery Temperature Monitoring	Yes (via thermistor)
Charge Status Output	Yes
RoHS Status	Compliant
MSL Level	2 (1 year)

BQ24133RGYR Pin Configuration

Pin 1	VIN — Input supply voltage
Pin 2	VIN — Input supply voltage
Pin 3	VIN — Input supply voltage
Pin 4	VIN — Input supply voltage
Pin 5	GND — Ground
Pin 6	GND — Ground
Pin 7	SW — Switch node
Pin 8	SW — Switch node
Pin 9	SW — Switch node
Pin 10	SW — Switch node
Pin 11	BAT — Battery connection
Pin 12	BAT — Battery connection
Pin 13	BAT — Battery connection
Pin 14	BAT — Battery connection
Pin 15	TS — Temperature sense input
Pin 16	ISET — Charge current program
Pin 17	VSET — Charge voltage program
Pin 18	CE — Charge enable (active low)
Pin 19	STAT — Charge status output
Pin 20	PG — Power good output
Pin 21	VREF — Reference voltage output
Pin 22	COMP — Loop compensation
Pin 23	GND — Ground
Pin 24	GND — Ground

Safe Operating Area (SOA) & Thermal Characteristics

No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.

Typical Applications

BQ24133RGYR is suitable for 6 applications: Portable Electronics, Power Tools, Medical Devices, Solar-Powered Chargers, Industrial Equipment, IoT Devices.

📱

Portable Electronics

The BQ24133RGYR is ideal for smartphones, tablets, and digital cameras, providing efficient charging of 1-2 cell Li-Ion batteries. Its 1.6MHz synchronous buck topology minimizes heat and allows small external components, fitting compact designs. The power path feature enables instant-on operation even with a depleted battery, and the high charge current (up to 2.5A) reduces charging time. The device's ±1% voltage accuracy ensures safe and full charging, extending battery life.

Recommended

🔧

Power Tools

For cordless power tools, the BQ24133RGYR charges 2-3 cell Li-Ion packs with up to 2.5A current. Its wide input voltage range (4.5V to 17V) accommodates various AC adapters, and the high switching frequency allows a compact charger design. The device's thermal regulation protects the IC during high-current charging, and the battery temperature monitoring ensures safe charging in demanding environments. The power path selector allows the tool to operate while charging, improving user convenience.

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LM5117MHX/NOPB · Texas Instruments TPS26600RHFR · Texas Instruments

💊

Medical Devices

The BQ24133RGYR is suitable for portable medical devices like glucose monitors and infusion pumps, where reliable and safe charging is critical. Its ±1% charge voltage accuracy and temperature monitoring ensure battery safety. The device's small VQFN package saves space in compact medical enclosures. The power path feature allows the device to operate from the adapter while charging, ensuring uninterrupted operation. The wide input range supports various power sources, including USB and wall adapters.

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TPS7A1601DGNR · Texas Instruments TPS74801DRCR · Texas Instruments

⚡

Solar-Powered Chargers

The BQ24133RGYR can be used in solar-powered battery chargers, thanks to its input voltage range of 4.5V to 17V, which matches the output of small solar panels. The synchronous buck topology achieves high efficiency, maximizing energy harvest. The power path selector allows the system to run directly from the solar panel when available, and the battery temperature monitoring prevents over-temperature charging. This makes it ideal for outdoor and off-grid applications.

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TPS63070RNMT · Texas Instruments TPS7A4700RGWR · Texas Instruments

🏭

Industrial Equipment

In industrial settings, the BQ24133RGYR charges backup batteries in sensors, controllers, and handheld terminals. Its -40°C to +85°C operating range suits harsh environments. The device's robust protection features, including thermal regulation and battery temperature monitoring, ensure reliable operation. The high switching frequency reduces external component size, saving PCB space in industrial enclosures. The power path feature allows equipment to run while charging, minimizing downtime.

Recommended

TPS54302DDCR · Texas Instruments TPS26600RHFR · Texas Instruments

🧩

IoT Devices

For IoT devices like smart sensors and trackers, the BQ24133RGYR provides efficient charging of small Li-Polymer batteries. Its low quiescent current in sleep mode helps extend battery life. The device's small package and minimal external components are ideal for space-constrained IoT nodes. The power path feature allows the device to operate from the adapter while charging, and the temperature monitoring ensures safe charging in various environments. The wide input range supports USB and energy harvesting sources.

Recommended

TPS62840DLCR · Texas Instruments TPS7A1601DGNR · Texas Instruments

Recommended Products Summary

What is the maximum charge current of BQ24133RGYR?

The BQ24133RGYR can deliver a maximum charge current of 2.5A. According to the TI datasheet, the charge current is programmable via an external resistor (ISET) and can be set from 0.5A to 2.5A. This makes it suitable for charging 1-3 cell Li-Ion or Li-Polymer battery packs in portable devices.

What is the input voltage range of BQ24133RGYR?

The BQ24133RGYR operates with an input voltage range of 4.5V to 17V. This wide range allows it to be powered from USB (5V), AC adapters (up to 16V), or solar panels. The device uses a synchronous buck converter to efficiently step down the input voltage to the battery voltage.

Does BQ24133RGYR support power path management?

Yes, the BQ24133RGYR includes an external power path selector that allows the system to run from the adapter while charging the battery. This feature enables instant-on operation even with a deeply discharged battery, and it prevents the battery from being discharged during system operation.

What is the switching frequency of BQ24133RGYR?

The BQ24133RGYR operates at a fixed switching frequency of 1.6MHz. This high frequency allows the use of small, low-profile inductors and capacitors, reducing the overall solution size. It also helps minimize ripple and improves transient response.

How accurate is the charge voltage regulation of BQ24133RGYR?

The BQ24133RGYR provides a charge voltage accuracy of ±1%. This high accuracy ensures that the battery is charged to its full capacity without overcharging, which is critical for battery longevity and safety. The voltage is set via external resistors.

Can BQ24133RGYR charge 1-cell, 2-cell, or 3-cell batteries?

Yes, the BQ24133RGYR can charge 1, 2, or 3 series Li-Ion or Li-Polymer cells. The number of cells is configured by external resistors that set the charge voltage. This flexibility makes it suitable for a wide range of applications, from smartphones to power tools.

What is the operating temperature range of BQ24133RGYR?

The BQ24133RGYR is specified for an operating temperature range of -40°C to +85°C. This industrial temperature range allows it to be used in harsh environments, including automotive and industrial applications, where temperature extremes are common.

Does BQ24133RGYR have battery temperature monitoring?

Yes, the BQ24133RGYR monitors battery temperature via an external thermistor (TS pin). It allows charging only within a preset temperature window, typically 0°C to 45°C for Li-Ion, to prevent damage from extreme temperatures. If the temperature is outside the window, charging is suspended.

What is the package size of BQ24133RGYR?

The BQ24133RGYR is available in a 24-pin VQFN (RGY) package measuring 5.5mm x 3.5mm. This compact package is suitable for space-constrained portable devices. The exposed thermal pad helps dissipate heat generated during charging.

Is BQ24133RGYR RoHS compliant?

Yes, the BQ24133RGYR is RoHS compliant. It is lead-free and halogen-free, meeting the requirements of the Restriction of Hazardous Substances directive. This makes it suitable for use in consumer electronics sold in the EU and other regions with RoHS regulations.

Where can I buy BQ24133RGYR?

BQ24133RGYR is available from major distributors such as DigiKey, Mouser, and Win Source. As of 2026-08-23, DigiKey lists it in stock with pricing starting at $3.42 for 1 unit. You can also order directly from Texas Instruments' website.

What is the price of BQ24133RGYR?

As of 2026-08-23, the price of BQ24133RGYR is approximately $3.42 for 1 unit, $3.08 for 10 units, $2.74 for 100 units, $2.47 for 500 units, and $2.19 for 1000 units, based on DigiKey pricing. Prices may vary by distributor and quantity.

What is the lead time for BQ24133RGYR?

The lead time for BQ24133RGYR is typically 1-2 weeks from major distributors like DigiKey and Mouser, as they usually stock this part. For larger quantities, lead time may extend to 4-6 weeks depending on availability. Check with your preferred distributor for current lead times.

Is BQ24133RGYR in stock?

Yes, BQ24133RGYR is in stock at major distributors such as DigiKey and Mouser as of 2026-08-23. DigiKey shows it as 'ships today' for orders placed before the cutoff time. Availability can change, so check the distributor's website for real-time stock status.

What is the difference between BQ24133RGYR and BQ24133RGYT?

The BQ24133RGYR and BQ24133RGYT are the same silicon in the same VQFN-24 package, but they differ in packaging and reel quantity. The RGYR is supplied in tape and reel with a standard quantity of 3000, while the RGYT is also tape and reel but with a different reel size (250 pieces). They are electrically identical and pin-compatible.

Can BQ24133RGYR be used for solar-powered chargers?

Yes, the BQ24133RGYR can be used in solar-powered chargers because its input voltage range of 4.5V to 17V accommodates the variable output of solar panels. The synchronous buck topology ensures high efficiency, maximizing energy harvest from the solar panel. The power path feature allows the system to run directly from the panel when available.

What is the best drop-in replacement for BQ24133RGYR?

The best drop-in replacement for BQ24133RGYR is the BQ24133RGYT, which is the same device in the same package with identical pinout and electrical specifications. Other alternatives include the BQ24130RGYR and BQ24133RGYR-Q1, but verify pin compatibility and parameters before substitution.

Can BQ24133RGYR replace BQ24130RGYR?

Yes, the BQ24133RGYR can replace the BQ24130RGYR in most applications, as both are 1-3 cell synchronous buck chargers in the same VQFN-24 package. However, the BQ24133 has a higher maximum charge current (2.5A vs 2A) and includes additional features like power path. Verify pinout and programming resistors for compatibility.

What are the key specifications of BQ24133RGYR that engineers should know?

The BQ24133RGYR is a 1.6MHz synchronous switch-mode Li-Ion/Li-Polymer battery charger with integrated MOSFETs and power path selector. It supports 1-3 cells, delivers up to 2.5A charge current, operates from 4.5V to 17V input, and has ±1% charge voltage accuracy. It includes battery temperature monitoring and is packaged in a 24-pin VQFN (5.5x3.5mm).

Hey Google, what can replace BQ24133RGYR?

The BQ24133RGYR can be replaced by the BQ24133RGYT (same part, different reel), BQ24130RGYR (lower current), or BQ24133RGYR-Q1 (automotive grade). All are pin-compatible in the VQFN-24 package. For cross-brand, consider the LTC4162 or MAX77958, but verify pinout and parameters.

Is BQ24133RGYR the same as BQ24133RGYT?

Yes, the BQ24133RGYR and BQ24133RGYT are electrically identical. The only difference is the packaging and reel quantity: RGYR is supplied in a 3000-piece reel, while RGYT is in a 250-piece reel. Both are in the VQFN-24 package and have the same pinout and specifications.

What is the best Analog Devices equivalent for BQ24133RGYR?

A potential Analog Devices equivalent for BQ24133RGYR is the LTC4162, which is a multi-cell synchronous buck battery charger. However, the LTC4162 is not pin-compatible and has a different package, so it is not a drop-in replacement. For a drop-in, stick with TI's BQ24133 variants.

Engineering reference data for BQ24133RGYR — comparison, design guidance, and compliance information.

Selection Guide

Choose the BQ24133RGYR when you need a high-current (up to 2.5A) synchronous buck charger with power path management for 1-3 cell Li-Ion/Li-Polymer batteries. It is ideal for portable electronics, power tools, and medical devices where fast charging and instant-on operation are important. If you do not need power path and can accept a lower charge current (2A), the BQ24130RGYR is a cost-effective alternative. For automotive applications, select the BQ24133RGYR-Q1 for AEC-Q100 compliance. The BQ24133RGYT is identical to the RGYR but comes in a smaller reel, suitable for prototyping or low-volume production. All alternatives share the same VQFN-24 package, allowing PCB layout reuse.

Comparison with Alternatives

Parameter	This Product	BQ24133RGYT	BQ24130RGYR	BQ24133RGYR-Q1
Package	VQFN-24 (RGY)	VQFN-24 (RGY)	VQFN-24 (RGY)	VQFN-24 (RGY)
Brand	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Maximum Charge Current	2.5 A	2.5 A	2 A	2.5 A
Input Voltage Range	4.5V to 17V	4.5V to 17V	4.5V to 17V	4.5V to 17V
Switching Frequency	1.6 MHz	1.6 MHz	1.6 MHz	1.6 MHz
Power Path	Yes	Yes	No	Yes
Automotive Grade	No	No	No	Yes (AEC-Q100)
Charge Voltage Accuracy	±1%	±1%	±1%	±1%

Key Differentiators

Higher charge current (2.5A) vs BQ24130RGYR (2A) (vs BQ24130RGYR)
Integrated power path selector (vs BQ24130RGYR)
Automotive grade option (Q1) available (vs BQ24133RGYR)

Design Notes

Place the input and output capacitors as close as possible to the VIN and BAT pins to minimize parasitic inductance. Use a 10uF ceramic capacitor for input and a 10uF ceramic capacitor for output. The inductor should be placed close to the SW pins to reduce switching noise. Ensure a solid ground plane under the IC for thermal and electrical performance.

The BQ24133RGYR can dissipate significant power during charging, especially at high input voltages and charge currents. The VQFN-24 package has an exposed thermal pad that must be soldered to a large copper area on the PCB. Provide adequate thermal vias to the ground plane to improve heat dissipation. For example, at VIN=12V, VBAT=8.4V, and 2A charge current, power dissipation is approximately 7.2W, requiring careful thermal design.

Do not exceed the absolute maximum input voltage of 17V. Ensure the ISET and VSET resistors are 1% tolerance to maintain accurate charge current and voltage. The TS pin must be connected to a thermistor with proper biasing; if not used, connect to a fixed voltage to disable temperature monitoring. Also, avoid placing the inductor too close to the TS pin to prevent noise coupling.