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RICOH RN5T562 Data Sheet

Summary

This integrated circuit provides comprehensive power management, combining a high-efficiency step-down DC/DC converter with two independently controllable Low Dropout Regulators (LDOs). Perfect for embedded systems and portable electronics requiring stable multi-rail power. The manual details electrical performance characteristics, operational guidelines, application circuits, and key protective features like UVLO and thermal shutdown, making it an essential resource for engineers designing reliable, low-ripple power conversion solutions from 1.746V to 4.5V.

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Step-down DC/DC with LDOs

RN5T562 Development Specifications

Rev.1.5

RICOH COMPANY, LTD. Electronic Devices Company

This specification is subject to change without notice.

Page Summary Contents For RICOH RN5T562 Data Sheet

Page 1 Step-down DC/DC with LDOs RN5T562 Development Specifications Rev.1.5 RICOH COMPANY, LTD. Electronic Devices Company This specification is subject to change without notice.
Page 2 RN5T562 Step-down DC/DC with LDOs Table of Contents 1. Outline.............................................................................................................................................
Page 3 RN5T562 Step-down DC/DC with LDOs 1. Outline RN5T562 integrates CMOS-based step-down DC/DC converter and two low dropout regulators (LDOs) with low supply current. A low ripple, high efficiency step-d...
Page 4 RN5T562 Step-down DC/DC with LDOs 5. Block Diagram The block diagram of the device is shown below. PV IN IN LX IN PG Fig 5-1 Block Diagram 6. Pin Configuration QFN 16pins, 3mm×3mm, t=0.8mm GND2 LDO2ON...
Page 5 RN5T562 Step-down DC/DC with LDOs 7. Pin Description No. Name I/O Function Notes 1 VO1 O Output voltage of LDO1. 2 VIN1 PWR Power supply for LDO1. 3 VIN2 PWR Power supply for LDO2. 4 VO2 O Output volt...
Page 6 RN5T562 Step-down DC/DC with LDOs 8. Electrical Characteristics 8.1 Absolute Maximum Ratings The operation exceeding “Absolute Maximum Ratings” below may cause permanent damage to the device. The oper...
Page 7 RN5T562 Step-down DC/DC with LDOs 8.3 Step-down DC/DC Converter Electrical Characteristics Operating Conditions (unless otherwise specified) VIN1, VIN2, VIN3, PVIN = 3.6V, Ta = 25℃ L1=2.2μH, COUT=4.7μ...
Page 8 RN5T562 Step-down DC/DC with LDOs 8.4 LDO1 Electrical Characteristics Operating Conditions (unless otherwise specified) VIN1, VIN2, VIN3, PVIN = 3.6V, COUT1 = 2.2μF, Ta = 25℃ Symbol Parameter Conditio...
Page 9 RN5T562 Step-down DC/DC with LDOs 8.5 LDO2 Electrical Characteristics Operating Conditions (unless otherwise specified) VIN1, VIN2, VIN3, PVIN = 3.6V, COUT2 = 2.2μF, Ta = 25℃ Symbol Parameter Conditio...
Page 10 RN5T562 Step-down DC/DC with LDOs 8.6 UVLO (Under Voltage Lock Out) Electrical Characteristics Operating Conditions (unless otherwise specified) Ta = 25℃ Symbol Parameter Condition Min Typ Max Units V...
Page 11 RN5T562 Step-down DC/DC with LDOs 8.8 DC Electrical Characteristics Operating Conditions (unless otherwise specified) VIN1, VIN2, VIN3, PVIN = 3.6V, Ta = 25℃ Symbol Parameter Condition Min Typ Max Uni...
Page 12 RN5T562 Step-down DC/DC with LDOs 10. Step-down DC/DC Converter DC/DC converter turns on by DCON="H" (DC/DC enable signal). During standby mode, LX pin is high impedance. When DC/DC becomes ...
Page 13 RN5T562 Step-down DC/DC with LDOs 11. Typical Application and Application Hints Fig 11-1 Typical Application and Application Hints Symbol Item L1 2.2μH R1 See section 9.1 R2 See section 9.1 Cf See sec...
Page 14 RN5T562 Step-down DC/DC with LDOs 12. Appendix ut pu t V ol ta ge [V 12.1 Reference Data of Step-down DC/DC Converter Operating Conditions VIN1, VIN2, VIN3, PVIN = 3.6V, Ta = 25℃ L1=2.2μH, COUT=4.7μF ...
Page 15 RN5T562 Step-down DC/DC with LDOs (3) Light Load Switching Waveforms DVOUT=1.2V, 10m A Load DVOUT=1.8V, 10m A Load 20m V/div 20m V/div DVOUT DVOUT AC Coupled AC Coupled 2V/div LX 2V/div Time (400ns/di...
Page 16 RN5T562 Step-down DC/DC with LDOs 13. Package Information ©2009 Rev.1.5 Page 16

Manual Details

Brand Ricoh
Pages 16
File Size 1.14 MB
Published May 31, 2026
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Frequently Asked Questions

What is the input voltage range for the various sections?

The range is 3.1V ~ 4.5V DC/DC and 1.746V (1.8V-3.0%) ~ 4.5V for the LDOs.

What protections does this IC feature?

It includes an Under Voltage Lock Out (UVLO) function, which activates at 2.20V (Typ.), and a Thermal Shutdown Circuit.

Can I individually control the regulators?

Yes, output enable/disable of the regulators can be individually controlled through external pins.

What are the maximum current limits for DC/DC and LDOs?

The maximum output current is 500mA for the DC/DC converter and 200mA for the LDOs.

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