ISL9110IRTNZ Renesas

DATASHEET ISL9110, ISL9112 FN7649 Rev.3.00 1.2A High Efficiency Buck-Boost Regulators Jul 26, 2018 The ISL9110 and ISL9112 are highly-integrated buck-boost Features switching regulators that accept input voltages either above or Accepts input voltages above or below regulated output below the regulated output voltage. Unlike other Buck-Boost voltage regulators, these regulators automatically transition between operating modes without significant output disturbance. Automatic and seamless transitions between Buck and Boost modes Both parts are capable of delivering up to 1.2A output current, Input voltage range: 1.8V to 5.5V and provide excellent efficiency due to their fully synchronous 4-switch architecture. No-load quiescent current of only 35A Output current: Up to 1.2A also optimizes efficiency under light-load conditions. Forced High efficiency: Up to 95% PWM and/or synchronization to an external clock may also be selected for noise sensitive applications. 35A quiescent current maximizes light-load efficiency 2.5MHz switching frequency minimizes external component The ISL9110 is designed for standalone applications and size supports 3.3V and 5V fixed output voltages or variable output voltages with an external resistor divider. Output voltages as Selectable Forced PWM mode and external synchronization low as 1V, or as high as 5.2V are supported using an external 2 I C Interface (ISL9112) resistor divider. Fully protected for overcurrent, over-temperature, and The ISL9112 supports a broader set of programmable features undervoltage 2 that may be accessed using an I C bus interface. With a Small 3mmx3mm TDFN Package programmable output voltage range of 1.9V to 5V, the ISL9112 is ideal for applications requiring dynamically changing supply voltages. A programmable slew rate can be Applications selected to provide smooth transitions between output voltage Regulated 3.3V from a single Li-ion battery settings. Smart phones and tablet computers The ISL9110 and ISL9112 require only a single inductor and Handheld devices very few external components. Power supply solution size is Point-of-load regulators minimized by a tiny 3mmx3mm package and a 2.5MHz switching frequency, which further reduces the size of external Related Literature components. For a full list of related documents, visit our website ISL9110, ISL9112 product pages V = 100 IN ISL9110IRTNZ 1.8V TO 5.5V 5 95 PVIN LX1 C 1 L1 10F 90 2.2H 6 VIN LX2 V = 5V IN 10 1 V = OUT MODE VOUT 85 3.3V/1A 9 EN 8 80 C V = 3V BAT 12 2 IN V = 2.5V STATUS IN FB 7 10F OUTPUTS PG 75 V = 3.3V GND PGND OUT 70 0.01 0.05 0.25 1.25 11 3 I (A) OUT FIGURE 2. EFFICIENCY FIGURE 1. TYPICAL APPLICATION FN7649 Rev.3.00 Page 1 of 21 Jul 26, 2018 EFFICIENCY (%)ISL9110, ISL9112 Table of Contents Applications 1 Table of Contents 2 Block Diagram 3 Pin Configurations 3 Pin Descriptions . 3 Ordering Information 4 Absolute Maximum Ratings . 5 Thermal Information . 5 Recommended Operating Conditions 5 Analog Specifications 5 2 I C Interface Timing Specification . 7 Typical Performance Curves 8 Functional Description 12 Functional Overview . 12 Internal Supply and References 12 Enable Input 12 Soft Discharge 12 POR Sequence and Soft-start 12 Overcurrent Protection . 12 Short-Circuit Protection . 12 Undervoltage Lockout 12 PG Status Output (ISL9110 only) . 12 BAT Status Output (ISL9110 only) 12 Ultrasonic Mode (ISL9112 only) 12 Thermal Shutdown 13 External Synchronization . 13 Buck-Boost Conversion Topology . 13 PWM Operation . 13 PFM Operation 13 Operation With VIN Close to VOUT 13 Output Voltage Programming . 13 Digital Slew Rate Control (ISL9112 only) 13 Register Description (ISL9112) 14 2 I C Serial Interface (ISL9112) . 14 Protocol Conventions 15 Write Operation . 16 Read Operation . 16 Applications Information 17 Component Selection 17 Output Voltage Programming, Adj. Version 17 Feed-Forward Capacitor Selection 17 Non-Adjustable Version FB Pin Connection 17 Inductor Selection . 17 PVIN and VOUT Capacitor Selection 17 Application Example 1 18 Application Example 2 18 Application Example 3 18 Recommended PCB Layout . 18 The TDFN Package Requires Additional PCB Layout Rules for the Thermal Pad . 18 General PowerPAD Design Considerations 19 Revision History 19 Package Outline Drawing 20 FN7649 Rev.3.00 Page 2 of 21 Jul 26, 2018