
USB-C Buck-Boost Voltage Regulator
The ISL95338 enables USB Type-C PD3.0 bidirectional voltage regulation for tablets, ultrabooks, power banks, and other mobile devices. This single-chip design replaces two voltage converters currently used for bidirectional buck and boost modes to reduce a customer's bill of materials (BOM) cost by 50%. It leverages Intersil's patented R3™ modulation technology to deliver acoustic noise-free operation, superior light-load efficiency and ultra-fast transient response.
Key Features
- Bidirectional buck, boost, and buck-boost operation
- Input voltage range 3.8V to 24V (no dead zone)
- Output voltage up to 20V
- Up to 1MHz switching frequency
- Programmable soft-start time
- LDO output for VDD and VDDP
- System status alert function
- Bidirectional internal discharge function
- Active switching for negative voltage transitions
- Bypass mode in both directions
- Forward mode enable, Reverse mode enable
- OCP, OVP, UVP, and OTP protection
- SMBus and auto-increment I2C compatible
- Pb-free (RoHS compliant)
- 32 Ld 4x4 TQFN Package
Description
The ISL95338 is a bidirectional, buck-boost voltage regulator that provides buck-boost voltage regulation and protection features. Intersil’s advanced R3™ Technology is used to provide high light-load efficiency, fast transient response, and seamless DCM/CCM transitions.
The ISL95338 takes input power from a wide range of DC power sources (conventional AC/DC ADPs, USB PD ports, travel ADPs, etc.) and safely converts it to a regulated voltage up to 24V. The ISL95338 can also convert a wide range DC power source connected at its output (system side) to a regulated voltage to its input (ADP side). This bidirectional buck-boost regulation feature makes its application very flexible.
The ISL95338 includes various system operation functions such as Forward mode enable, Reverse mode enable, programmable soft-start time, and adjustable VOUT in both the forward direction and reverse direction. The protection functionalities include OCP, OVP, UVP, OTP, etc.
The ISL95338 has serial communication through SMBus/I2C that allows programming of many critical parameters to deliver a customized solution. These programming parameters include, but are not limited to: output current limit, input current limit, and output voltage setting.
Applications
- Tablet, ultrabook, power bank, mobile devices, and USB-C
Alternatives | |||||
---|---|---|---|---|---|
Parameters | ISL95338 | ISL9237 | ISL9238 | ||
VIN (min) (V) | 3.8 | 3.2 | 3.2 | ||
VIN (max) (V) | 24 | 23.4 | 23.4 | ||
Battery Charge Voltage (V) | up to 20V | 2.4 to 13.824 | 2.4 to 18.304 | ||
Battery Charge Voltage Adjust (%) | 12mV steps | 8mV steps | 8mV steps | ||
DC Adapter Detection | Voltage sensing | Yes | Yes | ||
Topology | R3 modulator | R3 modulator | R3 modulator | ||
Switching Frequency (typ) (kHz) | 620 to 1000 | 733 or 1000 | 733 or 1000 | ||
Max Duty Cycle (%) | 100 | 100 | 100 | ||
Audible Noise | No | No | No | ||
Qualification Level | Standard | Standard | Standard |
Application Notes |
|||||
---|---|---|---|---|---|
Title | Type | Updated | Size | Other Languages | |
AN1681: Grounding Techniques Grounding Techniques 30 Jan 2018 496 KB | 30 Jan 2018 | 496 KB | |||
AN1684: Nonideality of Ground Nonideality of Ground 30 Jan 2018 392 KB | 30 Jan 2018 | 392 KB |
Datasheets |
|||||
---|---|---|---|---|---|
Title | Type | Updated | Size | Other Languages | |
ISL95338 Datasheet Bidirectional Buck-Boost Voltage Regulator 30 Nov 2017 1.76 MB | 30 Nov 2017 | 1.76 MB |
Design Files |
|||||
---|---|---|---|---|---|
Title | Type | Updated | Size | Other Languages | |
ISL95338EVAL1Z Design Files BOM, Artwork and Schematic Files for the ISL95338EVAL1Z Evaluation Board 29 Aug 2017 1.56 MB | ZIP | 29 Aug 2017 | 1.56 MB |
Software |
|||||
---|---|---|---|---|---|
Title | Type | Updated | Size | Other Languages | |
ISL95338EVAL1Z Software Installation Wizard Software for the ISL95338EVAL1Z Board to Evaulate the ISL95338 Bidirectional Buck-Boost Voltage Regulator 09 Oct 2017 779.4 MB | ZIP | 09 Oct 2017 | 779.4 MB |
User Guides |
|||||
---|---|---|---|---|---|
Title | Type | Updated | Size | Other Languages | |
ISL95338EVAL1Z Software Installation Guide ISL95338 Software Installation Guide 03 Oct 2017 598 KB | 03 Oct 2017 | 598 KB | |||
ISL95338EVAL1Z User Guide ISL95338EVAL1Z Evaluation Board User Guide 17 Aug 2017 1.75 MB | 17 Aug 2017 | 1.75 MB |
White Papers |
|||||
---|---|---|---|---|---|
Title | Type | Updated | Size | Other Languages | |
Inside a New Architecture for USB Type-C Applications 08 Feb 2018 314 KB | 08 Feb 2018 | 314 KB | |||
Five Easy Steps to Create a Multi-Load Power Solution 30 Jan 2017 502 KB | 30 Jan 2017 | 502 KB | |||
Understanding USB-C Buck-Boost Battery Charging | 11 Feb 2016 | 329 KB | 简体中文, deutsch |