The ISL91128 is a high-current, buck-boost switching regulator for systems using new battery chemistries. It uses the Renesas proprietary buck-boost algorithm to maintain voltage regulation while providing excellent efficiency and very low output voltage ripple when the input voltage is close to the output voltage. The device also includes a selectable Bypass mode for low power consumption in applications that have a Sleep or Low Power mode.
The ISL91128 is capable of delivering at least 2.2A continuous output current (VOUT = 3.3V) across a battery voltage range of 2.5V to 4.35V. This maximizes the energy utilization of advanced, single-cell Li-ion battery chemistries that have significant capacity left at voltages below the system voltage. Its fully synchronous low ON-resistance 4-switch architecture and a low quiescent current of only 30µA optimize efficiency under all load conditions.
The ISL91128 supports a broader set of programmable features that can be accessed using an I2C bus interface. With a programmable output voltage range of 1.9V to 5.0V, the ISL91128 is ideal for applications requiring dynamically changing supply voltages. A programmable slew rate can be selected to provide smooth transitions between output voltage settings.
The ISL91128 is available in a 20 bump, 0.4mm pitch WLCSP (2.15mmx1.74mm) with a 2.5MHz switching frequency, which further reduces the size of external components.
High Current Buck Boost with I2C Voltage
High Current Buck Boost with I2C Voltage
High Current Buck Boost with I2C Voltage
Win Source Part Number: 979615-ISL91128IINZ-
Category: Integrated Circuits (ICs)>PMIC - Voltage Regulators - DC DC Switching Regulators
Package: Tape & Reel (TR)
Standard Package: 250
Mounting: SMD (SMT)
Current - Output: 2.4A
Output Type: Adjustable
Function: Step-Up, Step-Down
Topology: Buck-Boost
Frequency - Switching: 2.5MHz
Voltage - Output (Max): 5V
Number of Outputs: 1
Output Configuration: Positive
Voltage - Input (Min): 1.8V
Voltage - Input (Max): 5.5V
Voltage - Output (Min/Fixed): 1.9V
Synchronous Rectifier: Yes
Package / Case: 20-UFBGA, WLCSP
Supplier Device Package: 20-WLCSP (2.15x1.74)
ECCN: EAR99
Fake Threat In the Open Market: 76 pct.
MSL Level: 1 (Unlimited)
REACH Status: REACH Unaffected
HTSUS: 8542.39.0001
Mfr: Renesas Electronics America Inc
Base Product Number: ISL91128
Buck-Boost Switching Regulator IC Positive Adjustable 1.9V 1 Output 2.4A 20-UFBGA, WLCSP
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IC REG BUCK-BST ADJ 2.4A 20WLCSP
Buck-Boost Switching Regulator IC Positive Adjustable 1.9V 1 Output 2.4A 20-UFBGA, WLCSP
IC REG BCK BST ADJ 2.4A 20WLCSP
| Renesas Electronics Corporation | RS Components, Ltd. | Win Source Electronics | DigiKey | VAST STOCK CO., LIMITED | Shenzhen Shengyu Electronics Technology Limited | Quarktwin Technology Ltd. | Lingto Electronic Limited | |
|---|---|---|---|---|---|---|---|---|
| Product Category | IC Switching Voltage Regulators | IC Switching Voltage Regulators | IC Switching Voltage Regulators | IC Switching Voltage Regulators | IC Switching Voltage Regulators | IC Switching Voltage Regulators | IC Switching Voltage Regulators | IC Switching Voltage Regulators |
| Product Number | ISL91128IINZ-T7A | 2639014 | 979615-ISL91128IINZ-T7A | ISL91128IINZ-T7A-ND | ISL91128IINZ-T7A | ISL91128IINZ-T7A | ISL91128IINZ-T7A | ISL91128IINZ-T7A |
| Product Name | High Efficiency Buck-Boost Regulator with 4.5A Switches and I2C Interface | Voltage Regulators | Integrated Circuits (ICs) - PMIC - Voltage Regulators - DC DC Switching Regulators | Voltage Regulators - DC DC Switching Regulators | Switching Voltage Regulators | Integrated Circuits (ICs) - Power Management (PMIC) - Voltage Regulators - DC DC Switching Regulators | Voltage Regulators - DC DC Switching Regulators | PMIC - Voltage Regulators - DC DC Switching Regulators |
| Configuration / Function | Buck-Boost | Buck; Boost | Buck-Boost | Buck-Boost | ||||
| Package Type | Other; WLCSP | Other; WLCSP-20 | Other; Tape & Reel (TR) | Other; 20-UFBGA, WLCSP | Other; 20-UFBGA, WLCSP | |||
| Output Voltage | 1.9 to 5 volts | 1.9 to 5 volts | 1.9 volts | 1.9 to 5 volts | ||||
| IOUT | 2.4 amps | 2.4 amps | 2.4 amps | 2.4 amps | 2.4 amps | 2.4 amps | ||
| VIN | 1.8 to 5.5 volts | 1.8 to 5.5 volts | 1.8 to 5.5 volts |
