RICOH RN5T561-0000 Data Sheet
Summary
This advanced power management IC serves as a highly versatile solution for sophisticated embedded electronics requiring complex, multi-rail voltage regulation. The device integrates multiple LDO regulators (including dedicated outputs for USB, LCD, and audio), step-down DC/DC conversion, UVLO protection, and thermal shutdown circuitry. This manual is designed for hardware engineers and developers, providing exhaustive technical specifications on its features, pin configuration, electrical characteristics, and detailed I2C communication protocols necessary for seamless system integration.
Page 1 Text Content
Power Management System Device
RN5T561-0000 Development Specifications
Rev. 1.3
RICOH COMPANY, LTD. Electronic Devices Company
This specification is subject to change without notice.
Page Summary Contents For RICOH RN5T561-0000 Data Sheet
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Power Management System Device RN5T561-0000 Development Specifications Rev. 1.3 RICOH COMPANY, LTD. Electronic Devices Company This specification is subject to change without notice.
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RN5T561-0000 POWER MANAGEMENT SYSTEM DEVICE Contents 1. Outline............................................................................................................................................
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RN5T561-0000 POWER MANAGEMENT SYSTEM DEVICE 8.3 LDO Control Register: LDOCTL (Command 001b)...................................................................................21 8.4 Mode Control Regist...
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RN5T561-0000 POWER MANAGEMENT SYSTEM DEVICE 1. Outline RN5T561 is the power management IC, which contains the power supply, the power supply control function and etc. in one-chip. 2. Feature Power Sup...
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RN5T561-0000 POWER MANAGEMENT SYSTEM DEVICE 3. Pin Configuration Fig 3-1 Pin Configuration ©2009 Rev. 1.3 Page 4
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RN5T561-0000 POWER MANAGEMENT SYSTEM DEVICE 4. Block Diagram Fig 4-1 Block Diagram ©2009 Rev. 1.3 Page 5
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RN5T561-0000 POWER MANAGEMENT SYSTEM DEVICE 5. Pin Description NO NAME I/O FUNCTION NOTES 1 FB I Output voltage feedback of DC/DC converter 2 VIN1 PWR Power supply for DC/DC converter 3 LX O Switch ou...
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RN5T561-0000 POWER MANAGEMENT SYSTEM DEVICE 6. Power On/Off Control Fig 6-1 Power On/Off Timing RN5T561 can be asserted power on by pushing VEN pin high but UVLO signal should be high by detecting the...
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RN5T561-0000 POWER MANAGEMENT SYSTEM DEVICE 7. Functional Blocks 7.1 Regulators RN5T561 has 4 Low Drop Output regulators, LDO1 to LDO4. Power on/off of each regulator and ECO-mode of LDO1, 2 and 3 are...
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RN5T561-0000 POWER MANAGEMENT SYSTEM DEVICE 7.1.1 Operation Mode Control RN5T561 provides ECO-mode in LDO1, 2 and 3 for low power consumption. When peripheral Ics are in sleep state or low power consu...
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RN5T561-0000 POWER MANAGEMENT SYSTEM DEVICE 7.1.2 LDO1 Electrical Characteristics (1) Normal Mode Operating Conditions (unless otherwise specified) VIN = 3.6V, CREFO = 1.0μF, Ta = 25℃ Symbol Parameter...
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RN5T561-0000 POWER MANAGEMENT SYSTEM DEVICE 7.1.3 LDO2 Electrical Characteristics (IO/LCD) (1) Normal Mode Operating Conditions (unless otherwise specified) VIN = 3.6V, CREFO = 1μF, Ta = 25℃ Symbol Pa...
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RN5T561-0000 POWER MANAGEMENT SYSTEM DEVICE 7.1.4 LDO3 Electrical Characteristics (USB) (1) Normal Mode Operating Conditions (unless otherwise specified) VIN = 3.6V, CREFO = 1μF, Ta = 25℃ Symbol Param...
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RN5T561-0000 POWER MANAGEMENT SYSTEM DEVICE 7.1.5 LDO4 Electrical Characteristics (Analog/Audio) Operating Conditions (unless otherwise specified) VIN = 3.6V, CREFO = 1μF, Ta = 25℃ Symbol Parameter Co...
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RN5T561-0000 POWER MANAGEMENT SYSTEM DEVICE 7.2 Step-down DC/DC Converter DCDC converter turns on by VEN=“H” (DC/DC enable signal). During standby mode, LX pin is high impedance. When DCDC becomes act...
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RN5T561-0000 POWER MANAGEMENT SYSTEM DEVICE 7.2.2 Target Electrical Characteristics Operating Conditions (unless otherwise specified) VIN = 3.6V, CREFO = 1μF, Ta = 25℃ Symbol Parameter Condition Min T...
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RN5T561-0000 POWER MANAGEMENT SYSTEM DEVICE 7.3 Thermal Shutdown Circuit Overheat state can be detected by comparing the output voltages from two temperature detection circuits, which have different t...
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RN5T561-0000 POWER MANAGEMENT SYSTEM DEVICE 7.4 CPU Interface RN5T561 uses I2C-Bus system for CPU connection via 2-wires. Connection and transfer system of I2C-Bus are described in the following secti...
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RN5T561-0000 POWER MANAGEMENT SYSTEM DEVICE 7.4.2 Data Transmission and its Acknowledge After start condition, data is transmitted by 1byte (8bits). The number of bytes that can be transmitted per tra...
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RN5T561-0000 POWER MANAGEMENT SYSTEM DEVICE 7.4.4 Data Transmission Write Format The transmission format for the slave address allocated to each IC is defined by I2C-Bus standard. However transmission...
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RN5T561-0000 POWER MANAGEMENT SYSTEM DEVICE 7.4.6 AC Characteristics of I2C-Bus Operating Conditions (unless otherwise specified) VIN= 3.6V, CREFO = 1μF, Ta = 25℃ Symbol Parameter Condition Min Typ Ma...
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RN5T561-0000 POWER MANAGEMENT SYSTEM DEVICE 8. Register 8.1 Register Map Function Command Data Name C2 C1 C0 D4 D3 D2 D1 D0 DCCTL 0 0 0 - - - - DCON LDOCTL 0 0 1 - LDO4ON LDO3ON - LDO1ON MODECTL 0 1 0...
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RN5T561-0000 POWER MANAGEMENT SYSTEM DEVICE 9. Electrical Characteristics 9.1 Absolute Maximum Ratings The operation exceeding “Absolute Maximum Ratings” below may cause permanent damage to the device...
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RN5T561-0000 POWER MANAGEMENT SYSTEM DEVICE 9.3 DC Characteristics Operating Conditions (unless otherwise specified) VIN= 3.6V, CREFO = 1μF, Ta = 25℃ Symbol Parameter Condition Min Typ Max Units VT1+ ...
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RN5T561-0000 POWER MANAGEMENT SYSTEM DEVICE 10. Package Information ©2009 Rev. 1.3 Page 24
Manual Details
| Brand | Ricoh |
|---|---|
| Pages | 25 |
| File Size | 1.68 MB |
| Published | June 04, 2026 |
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Frequently Asked Questions
What are the recommended operating temperature limits for this device?
The recommended range of operation is -30℃ to +85℃.
How does the system prevent damage during low supply voltage conditions?
It includes a UVLO (Under Voltage Lock Out) feature for protection.
What are the criteria for calculating allowable dissipation on a printed circuit board?
The maximum allowable dissipation is PD 950 mW, but derating must be applied if operating above +70℃.
Which protocol does the CPU use to communicate with the power management device?
Communication uses the I2C-Bus, and specific details regarding its slave address are provided in Section 7.4.3.