Solutions
Special Contents for Automotive Applications
Electrification of automobile by RICOH power management IC
The reason RICOH power management IC has been chosen for more than 20 years
Special Contents for IoT Devices
Supporting your IoT system construction
Ultra-low supply current / Low noise / Low electromotive force / Battery monitoring
Special Contents for Industrial Applications
RICOH's 3 approaches to industrial equipment field
Long term supply / Flexible quantity purchase / High quality and reliability
Design Support
Technical Information on Power Management ICs
Small in Size, Efficient in Heat Dissipation and Suitable for Automotive.
Ricoh's Thermal Design Support
You can analyze thermal characteristics at customer's concept design stage
Document Download
About RICOH Electronic Devices
R1290 Series
Triple Output DCDC Converter for LCD/CCD
- High-Temp.
- PLP
- RoHs
Sample Online
Purchase
Technical Support
Product Specifications
The R1290 Series are triple output CMOS-based step-up/inverting DC/DC converters. R1290 consists of the inductor type PWM step-up DC/DC converter (DC/DC1) with an internal 2A Nch. driver and charge pump type positive/negative DC/DC converters (DC/DC2, DC/DC3). Triple output start-up sequence can be set by external capacitors. R1290 is ideally suitable for use in power source for equipment that requires sequence control such as LCD and CCD.
FEATURES
| Consumer | Automotive | |
|---|---|---|
| Input Voltage Range (Maximum Rating) | 2.0 V to 5.5 V (6.5 V) | |
| Operating Temperature Range | −40°C to 95°C | −40°C to 105°C |
| Step-up DCDC Controller | Built-in 2 A Nch-switch (RON = 150 mΩ Typ.) | |
| Overcurrent Protection | ||
| Adjustable VOUT up to 20 V with external resistors | ||
| Temperature Coefficient of VFB: Typ. ±150 ppm/°C | ||
| Adjustable Phase compensation with external components | ||
| Maxduty adjustable with external resistors for DTC pin | ||
| Soft-start time adjustable with external capacitor for SS pin | ||
| Oscillator Frequency: Adjustable frequency with resistors (180 kHz to 1400 kHz) | ||
| Charge-pump | Adjustable output voltage with external resistors | |
| Temperature Coefficient of VREF: Typ. 150 ppm/°C | ||
| Temperature Coefficient of CPPFB: Typ. 150 ppm/°C | ||
| Sequence function: Charge-pump turns on after the main step-up converter voltage outputs. The positive charge-pump and the negative charge-pump turn-on sequence control is adjustable by setting delay time for each channel | ||
| Oscillator Frequency: 1/4 of the main step-up DC/DC converter oscillator frequency | ||
| Controller | Under Voltage Lock-Out (UVLO: selectable detector threshold from 1.8 V/ 2.2 V/ 2.8 V) | |
| Short Protection with timer latch function (adjustable delay time with external capacitor) | ||
| Shutdown all the outputs if at least one of three outputs is shorted to the GND. | ||
| Stand-by function by CE pin | ||
| Package | QFN0404-24 | |
APPLICATION INFORMATION
For external parts, please refer to the datasheet.
PIN DESCRIPTION
QFN0404-24
4.0 mm × 4.0 mm| 1 | PGND |
| 2 | PGND |
| 3 | AGND |
| 4 | VIN |
| 5 | VREF |
| 6 | CE |
| 7 | VFB |
| 8 | SS |
| 9 | TST |
| 10 | DTC |
| 11 | DELAY |
| 12 | AMPOUT |
| 13 | RT |
| 14 | CPNDLY |
| 15 | CPNFB |
| 16 | CPPDLY |
| 17 | CPPFB |
| 18 | CPGND |
| 19 | CPN |
| 20 | CPVCC |
| 21 | CPP |
| 22 | CPPSW |
| 23 | Lx |
| 24 | Lx |
*) The tab is substrate level (GND).
R1290 Series for Consumer
APPLICATIONS
- Power source for hand-held equipment
- Power source for LCD and CCD
PRODUCT LONGEVITY PROGRAM
R1290 series for consumer applications operate PRODUCT LONGEVITY PROGRAM.
This program has been introduced to help customers select the most appropriate part for applications that require long life cycles.
SELECTION GUIDE
The UVLO threshold voltage can be selected at the user’s request.
| Product Name | Package | Quantity per Reel | |
|---|---|---|---|
| R1290K10xA−E2 |   |
QFN0404-24 | 1,000 |
- x … Designation of UVLO threshold
1: 1.8V
2: 2.2V
3: 2.8V
DOCUMENT/CONTACT
| Package *1 | Marking | Reliability *2 |
|---|---|---|
| QFN0404-24 | R1290K | R1290K |
*1: The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and land pattern (foot pattern).
*2: Reliability file includes a reliability test report and a reflow profile.
R1290 Series for Automotive
Ricoh is committed to providing a semiconductor device with the highest level of quality and reliability by restricting the device manufacturing only within Ricoh and the cooperative companies successfully passed our stringent inspections for automotive products. Ricoh established a traceability system and manages manufacturing information and logistics information from the warehouse.
Quality Ranks for Applications
Ricoh offers three different quality ranks for automotive products according to their application purposes.
R1290 Series offer products in Rank 3.
Rank 3: Automotive Accessories
- Power source for car accessories such as car audio equipment, car navigation system, and ETC system
PRODUCT LONGEVITY PROGRAM
R1290 series for automotive applications operate PRODUCT LONGEVITY PROGRAM.
This program has been introduced to help customers select the most appropriate part for applications that require long life cycles.
Operating Temperature Range : -40°C to 105°C
SELECTION GUIDE
The UVLO threshold voltage is user-selectable.
| Product Name | Package | Quantity per Reel | |
|---|---|---|---|
| R1290K10xA-E2-AE |   |
QFN0404-24 | 1,000 |
- x … Designation of UVLO threshold
1: 1.8V
2: 2.2V
3: 2.8V
DOCUMENT/CONTACT
| Package*1 | Reliability*2 |
|---|---|
| QFN0404-24 | R1290K (-AE) |
*1: The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and land pattern (foot pattern).
*2: Reliability file includes a reliability test report and a reflow profile.
*3: The reliability information is not listed for devices above rank2. Please contact Ricoh sales representatives for further informations.
Inquiry about products
Contact Us by Mail
Contact Us by Phone
Inquiry about purchase
Purchase, Request for Samples and Documents
Sample Online
Related Links for Automotive
Quality Assurance
Copyright © RICOH Electronic Devices Co., Ltd. All Rights Reserved.