ISL9307

3MHz Dual 1500mA Step-Down Converters and Dual Low-Input LDOs

Product Status: Mass Production

OVERVIEW

The ISL9307 is an integrated mini Power Management IC (mini-PMIC) ideal for applications for powering
low-voltage microprocessor or multiple voltage rails with a battery as an input source, such as a single Li-ion or Li-polymer. ISL9307 integrates two high-efficiency, 3MHz, synchronous step-down converters (DCD1 and DCD2) and two low-input, low-dropout linear regulators (LDO1 and LDO2).

The 3MHz PWM switching frequency allows the use of very small external inductors and capacitors. Both
step-down converters can enter skip mode under light load conditions to further improve efficiency and maximize battery life.

The ISL9307 features EN pins for each channel, thus allowing startup delay for power sequencing.

The ISL9307 also provides two 300mA low-dropout (LDO) regulators. The input voltage range is 1.5V to 5.5V, which allows them to be powered from one of the on-chip step-down converters or directly from a battery. The default LDO power-up output comes with factory pre-set fixed output voltage options between 0.9V and 3.3V.

The ISL9307 is available in a 4mmx4mm 16 Ld TQFN.

KEY FEATURES

    • Dual 1500mA, Synchronous Step-down Converters and Dual 300mA, General-purpose LDOs
    • Input Voltage Range
      - DCD1/DCD2: 2.5V to 5.5V
      - VINLDO: 1.5V to 5.5V
    • Adjustable Output Voltage
      - VODCD1/VODCD2: 0.8V to VIN
    • 50μA IQ (Typ) with DCD1/DCD2 in Skip Mode; 20μA IQ (Typ) for each Enabled LDO
    • EN Pins for DCD1/DCD2 and LDO1/LDO2
    • Small, Thin, 4mmx4mm TQFN

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL9307
Basic Information
Production Status
Mass Production
# of Outputs
4
Topology [Rail 1]
Buck
Input Voltage Min (V) [Rail 1]
2.5
Input Voltage Max (V) [Rail 1]
5.5
Output Voltage Min (V) [Rail 1]
0.9
Output Voltage Max (V) [Rail 1]
3.3
Output Current Max (A) [Rail 1]
1.5
IQ [Rail 1]
50 µA
Switching Freq. (max) (MHz)
3.4
Switching Freq. (min) (MHz)
2.6
Max Duty Cycle (%)
See Datasheet
Qualification Level
Standard
Peak Efficiency (%)
92
POR
No
SYNCH Capability
No
Control Type
Current Mode
Switching Frequency Range (MHz)
2.6 to 3.4
Can Sample
YES
Temperature Range
-40 to +85

Design Resources and Tools

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Cross Reference

Intersil Cross Reference

Cross-reference based on data from industry sources. Support for the online tool has been discontinued, but the data is still available.

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Knowledge Base

Switching Regulators FAQs

Find answers to common questions, support articles and development hints.


FAQs

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Find out how the highly efficient, compact 12V synchronous buck regulator family can meet your power requirements for 12V rails.
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This webinar introduces three buck-boost regulators in QFN packages, ISL91127IR, ISL91107IR and ISL9120IR, for battery-powered portable devices.
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This webinar introduces the ISL85003 and ISL85003A synchronous buck (step-down) regulators with integrated high-side and low-side FETs.
11:01
This webinar introduces the ISL78233, ISL78234 and ISL78235 automotive grade synchronous buck regulators for point-of-load applications.
3:02
Find out how the highly efficient, compact 12V synchronous buck regulator family can meet your power requirements for 12V rails.
9:50
This webinar introduces three buck-boost regulators in QFN packages, ISL91127IR, ISL91107IR and ISL9120IR, for battery-powered portable devices.
3:57
This webinar introduces the ISL85003 and ISL85003A synchronous buck (step-down) regulators with integrated high-side and low-side FETs.
11:01
This webinar introduces the ISL78233, ISL78234 and ISL78235 automotive grade synchronous buck regulators for point-of-load applications.

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