R1800K NISSHINBO | Alldatasheet

Document overview

  • Manufacturer or author: Provided By alldatasheet.com(free datasheet download site)
  • PDF pages: 17

Technical content

144 nA IQ Low Quiescent Current Buck DC/DC Converter for Energy Harvester No. EA-414-240417 R1800K is a power-storing buck DC/DC converter for a photovoltaic and vibration energy harvester. A low operating quiescent current allows a harvester to be used under a low-illumination environment, and it is suitable for an equipment with low power supplied from a harvester.

  • Providing a low operating quiescent current (IQ 144 nA) and a high efficiency (approximately 90%@10 µA).
  • A Control function that enables a maximum power optimizes a power supply from an energy harvester.
  • Input Voltage Range: 2.0 V to 5.5 V
  • Output Voltage Range: 2.0 V to 4.5 V
  • Output Voltage Accuracy: ±3.0%
  • Operating Quiescent Current: Typ.144 nA (Ta = 25°C, at no load)
  • Starting Power: 720 nW
  • Reverse Current Protection (VIN ≥ 2.0 V)
  • Accuracy of Maximum Power Voltage: 200 mV Efficiency vs. Output Current VSET = 3.3 V
  • Energy harvesting module of a photovoltaic and vibration energy harvester VIN VM LX VFB L R1800K TEST1 COUT TEST2 Load PGND CIN AGND Photovoltaic Element L = 22 µH, CIN = 10 µF, COUT = 47 µF Product Name Package Quantity per Reel R1800KxxxA-TR DFN(PL)2730-12 5,000 pcs xxx: Select the ideal combination of the set output voltage (VSET) and the set maximum power voltage (VMPSET) from the code number starting from 002. 100 0.1 1 10 100 1000 10000 Efficiency (%) Output Current (uA) Vin= 4 V Vin= 4.5 V Vin= 5 V OVERVIEW KEY BENEFITS KEY SPECIFICATIONS SELECTION GUIDE TYPICAL CHARACTERISTICS PACKAGE

APPLICATIONS

DFN(PL)2730-12 2.7 mm x 3.0 mm x 0.6 mm TYPICAL APPLICATION

No. EA-414-240417 SELECTION GUIDE The set output voltage and set maximum power voltage are user-selectable options. Selection Guide Product Name Package Quantity per Reel Pb Free Halogen Free R1800KxxxA-TR DFN(PL)2730-12 5,000 pcs Yes Yes xxx: Select the ideal combination of the set output voltage (VSET) and the set maximum power voltage (VMPSET) from the code number starting from 002. Output voltage: 2.0 V to 4.5 V in 0.1 V step Maximum power voltage: 2.0 V to 5.3 V in 0.1 V step BLOCK DIAGRAM R1800K Block Diagram Buffer Logic On time generator LX VFB VIN Vin AGND Vin Vin Vin Vfb Vin Vref Vin Reverse Current Protection Vin Vfb VM TES TES Vfb Vin Iref AGND AGND AGND AGND AGND AGND AGND AGND AGND PGND PGND P PGND P

No. EA-414-240417 PIN DESCRIPTION Top View Bottom View DFN(PL)2730-12 Pin Configuration DFN(PL)2730-12 Pin Description Pin No. Symbol Description

1 AGND AGND Pin

2 TEST1 Pin for Testing (Must not be connected)

3 TEST2 Pin for Testing (Must not be connected)

4 VM Pin for Testing (Must not be connected)

5 NC No Connection (Must not be connected)

6 NC No Connection (Must not be connected)

7 VFB Feedback Pin

8 PGND PGND Pin

9, 10 LX DC/DC Switching Pin 11, 12 VIN Pin for Connecting Photovoltaic Element (1) The tab on the bottom of the package enhances thermal performance and is electrically connected to GND (substrate level). It is recommended that the tab be connected to the ground plane on the board, or otherwise be left floating. 1 2 3 4 5 6 7 8 9 10 11 12 6 5 4 3 2 1 12 11 10 9 8 7 (1)

No. EA-414-240417 ABSOLUTE MAXIMUM RATINGS Absolute Maximum Ratings (GND = 0 V) Symbol Parameter Rating Unit VIN VIN Pin Voltage −0.3 to 6.5 V VLX LX Pin Voltage −0.3 to VIN + 0.3 V VVFB VFB Pin Voltage −0.3 to 6.5 V PD Power Dissipation (1) [ DFN(PL)2730-12, JEDEC STD. 51-7 Test Land Pattern ] 1850 mW Tj Junction Temperature Range −40 to 85 °C Tstg Storage Temperature Range −55 to 125 °C ABSOLUTE MAXIMUM RATINGS Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause permanent damage and may degrade the lifetime and safety for both device and system using the device in the field. The functional operation at or over these absolute maximum ratings is not assured. RECOMMENDED OPERATING CONDITIONS Recommended Operating Conditions Symbol Parameter Rating Unit VIN Input Voltage 2.0 to 5.5 V Ta Operating Temperature Range −40 to 85 °C RECOMMENDED OPERATING CONDITIONS All of electronic equipment should be designed that the mounted semiconductor devices operate within the recommended operating conditions. The semiconductor devices cannot operate normally over the recommended operating conditions, even if they are used over such conditions by momentary electronic noise or surge. And the semiconductor devices may receive serious damage when they continue to operate over the recommended operating conditions. (1) Refer to POWER DISSIPATION for detailed information.

No. EA-414-240417

ELECTRICAL CHARACTERISTICS

The specifications surrounded by a re guaranteed by design engineering at −40°C ≤ Ta ≤ 85°C. Symbol Parameter Condition Min. Typ. Max. Unit VOUT Output Voltage VIN ≥ VSET + 0.5 V, at no load x 0.97 x 1.03 V IQ Operating Quiescent Current VIN = 5.0 V, VSET = 3.0 V, device not switching 144 300 nA PST Minimum Starting Power Ta = 25°C, VIN = 4 V, VSET = 3.3 V, when constant current is applied 720 nW VMP Accuracy of Maximum Power Voltage 200 mV IREV Reverse Current VIN ≥ 2.0 V, VFB = 4.5 V (When VIN drops from 2.5 V or more) Charging current to CIN and COUT are not included(1) 10 100 nA All test items listed under Electrical Characteristics are done under the pulse load condition (Tj ≈ Ta = 25°C). Test circuit is operated with “Open Loop Control” (GND = 0 V), unless otherwise specified. (1) Reverse current protection operates at VIN ≥ 2 V . It does not function with the voltage under 2 V. Set as VMPSET > VSET + 0.5 V. Due to having a hysteresis in the reverse current protection, a state may be detected as a reverse current even if VIN = VOUT.

No. EA-414-240417 The specifications surrounded by a re guaranteed by design engineering at −40°C ≤ Ta ≤ 85°C. Product-specific Electrical Characteristics Product Name VOUT [V] VMP [V]

No. EA-414-240417 THEORY OF OPERATION MAXIMUM POWER CONTROL V (V) Time Time Input voltage VIN Output voltage VFB VMP Set output voltage Vicinity of the solar cell release voltage Intervals of the charge transfer to COUT by switching Intervals of CIN charge by solar cell R1800K transfers power to a secondary side at the maximum power voltage (V MP), which is the operating point of the maximum amount of power generation of a solar cell. After R1800K receives power from the solar cell, the input voltage increases and when it reaches the VMP, a switching starts and the R1800K transfers power to the secondary side. When a power transfer amount exceeds the supplied power from the solar cell, the input voltage decreases by the switching. At a certain point, the switching stops and a state changes to a charging mode. When the input voltage reaches the V MP again, the R1800K transfers power to the secondary side. By repeating this operation enables transferring power to the secondary side while maintaining the operating point of the maximum amount of power generation of the solar cell.

No. EA-414-240417 REVERSE CURRENT DETECTION V (V) Time Time Input voltage VIN Output voltage VFB 2 V R1800K has a reverse current protection to maintain an electric charge of the output side when the light is cut off. When the light is cut off after a normal operation and a power supply from the solar cell is discontinued, the charge of supply current of a circuit connected respectively to the input and output sides is drawn. When the input voltage drops below the output voltage, the reverse current protection operates (at the backflow) and prevents the charge drawn from the output side. As shown in the figure above, this protection operates at 2 V or higher. When the input voltage drops below 2 V, the charge of the output side flows back to the input side. The drawn charge increases for a moment, but the R1800K returns to the reverse current protection state. The average amount of charge drawn from the output side is extremely minute.

No. EA-414-240417

APPLICATION INFORMATION

Typical Application Circuit VIN VM LX VFB L R1800K TEST1 COUT TEST2 Load PGND CIN AGND Photovoltaic Element VIN VM LX VFB L R1800K TEST1 COUT TEST2 Load PGND CIN AGND vibration energy harvester R1800K Typical Application Circuit Recommended External Components Symbol Descriptions Parts Name CIN Ceramic Capacitor 10 µF or higher C1608X5R1E106M080AC COUT Ceramic Capacitor 47 µF or higher C3216X6S1A476M160AC Large-capacity Electrical Storage Device Refer below table L Inductor 22 µH VLS201612CX-220M-1 Recommended Large-capacity Electrical Storage Devices Manufacturer Series Parts Name Capacity Type Supplement TDK CeraCharge™ BCT1812M101AG 100µAh All-solid-state Li-ion CeraCharge™ is a trademark of TDK NICHICON SLB series SLB03070LR35 350µAh Li-ion NGK EnerCera® ET1210C-R ET2016C-R ET271704P-H 5mAh 25mAh 5mAh Li-ion EnerCera® is a trademark of NGK Murata CT series CT04120 3mAh Li-ion

No. EA-414-240417 TECHNICAL NOTES The performance of a power source circuit using this device is highly dependent on a peripheral circuit. A peripheral component or the device mounted on PCB should not exceed a rated voltage, a rated current or a rated power. When designing a peripheral circuit, please be fully aware of the following points.

  • External components must be connected as close as possible to the IC and make wiring as short as possible. Especially, the capacitor connected in between VIN pin and GND pin must be wiring the shortest.
  • If their impedance is high, internal voltage of the IC may shift by the switching current, and the operating may be unstable. Make the power supply and GND lines sufficient.
  • As for wirings of the power, the ground, the inductor, the LX and the VFB pins, due consideration must be given to large current occurred by switching.
  • Using a ceramic capacitor with a lower equivalent series resistance (ESR) is recommended; a capacitor of 10µF or higher for CIN between VIN and GND pins, a capacitor of 47µF or higher for COUT. Using a mass- storage device for C OUT also is recommended. Please choose capacitors depending on the bias characteristics, VIN and VOUT. (Refer to Recommended External Components)
  • Please choose inductors which have low direct -current resistance, enough allowable current and low magnetic saturation. Current-limited circuit may operate with LX peak current before reaching expected load current in case of low allowable current and extremely low inductance value under load condition.
  • Note that the current-limited circuit is self-heating and radiation environment sensitive.

No. EA-414-240417  PCB Layout R1800KxxxA-TR (PKG:DFN(PL)2730-12) Top Layer Bottom Layer

No. EA-414-240417 TYPICAL CHARACTERISTICS Note: Typical Characteristics are intended to be used as reference data; they are not guaranteed. 1) Efficiency vs. Output Current VSET = 3.3 V 2) Quiescent Current vs. Temperature 3) Output Voltage vs. Output Current 100 0.1 1 10 100 1000 10000 Efficiency (%) Output Current (uA) Vin= 4 V Vin= 4.5 V Vin= 5 V 0 100 120 140 160 180 200 -50 -25 0 25 50 75 100 Quiescent Current IQ (nA) Temperature Ta (°C) 3.05 3.1 3.15 3.2 3.25 3.3 3.35 0 500 1000 1500 2000 Output Voltage (V) Output Current (uA) Vin= 4 V Vin= 4.5 V Vin= 5 V 3.2 3.22 3.24 3.26 3.28 3.3 3.32 3.34 3.36 3.38 3.4 0 200 400 600 800 1000 Output Voltage (V) Output Current (uA) Vin= 4 V Vin= 4.5 V Vin= 5 V

POWER DISSIPATION DFN(PL)2730-12 PD-DFN(PL)2730-12-(8585)-JE-C i The power dissipation of the package is dependent on PCB material, layout, and environmental conditions. The following measurement conditions are based on JEDEC STD. 51. Measurement Conditions Item Measurement Conditions Environment Mounting on Board (Wind Velocity = 0 m/s) Board Material Glass Cloth Epoxy Plastic (Four-Layer Board) Board Dimensions 76.2 mm × 114.3 mm × 0.8 mm Copper Ratio Outer Layer (First Layer): Less than 95% of 50 mm Square Inner Layers (Second and Third Layers): Approx. 100% of 50 mm Square Outer Layer (Fourth Layer): Approx. 100% of 50 mm Square Through-holes  0.3 mm × 32 pcs Measurement Result (Ta = 25°C, Tjmax = 85°C) Item Measurement Result Power Dissipation 1850 mW Thermal Resistance (ja) ja = 32°C/W Thermal Characterization Parameter (ψjt) ψjt = 8°C/W ja: Junction-to-Ambient Thermal Resistance ψjt: Junction-to-Top Thermal Characterization Parameter Power Dissipation vs. Ambient Temperature Measurement Board Pattern 500 1000 1500 2000 2500 0 20 40 60 80 Power Dissipation (mW) Ambient Temperature (°C) 1850

PACKAGE DIMENSIONS DFN(PL)2730-12 DM-DFN(PL)2730-12-JE-B i DFN(PL)2730-12 Package Dimensions (Unit: mm)

Ver. B i : Product Code … Refer to Part Marking List : Lot Number … Alphanumeric Serial Number DFN(PL)2730-12 Part Markings NOTICE There can be variation in the marking when different AOI (Automated Optical Inspection) equipment is used. In the case of recognizing the marking characteristic with AOI, please contact our sales or distributor before attempting to use AOI.   1 2 3 4 5 6 12 11 10 9 8 7

Ver. B ii R1800K Part Marking List Product Name     R1800K002A FX02 R1800K003A FX03 R1800K004A FX04 R1800K005A FX05 R1800K006A FX06 R1800K008A FX08 R1800K009A FX09 R1800K010A FX10 R1800K011A FX11 R1800K014A FX14 R1800K016A FX16 R1800K019A FX19 R1800K020A FX20 R1800K021A FX21 R1800K022A FX22 R1800K023A FX23

  1. T he products and the product specifications described in this document are subject to change or discontinuation of production without notice for reasons such as improvement. Therefore, before deciding to use the products, please refer to our sales representatives for the latest information thereon. 2. The materials in this document may not be copied or otherwise reproduced in whole or in part without the prior written consent of us. 3. This product and any technical information relating thereto are subject to complementary export controls (so- called KNOW controls) under the Foreign Exchange and Foreign Trade Law, and related politics ministerial ordinance of the law. (Note that the complementary export controls are inapplicable to any application-specific products, except rockets and pilotless aircraft, that are insusceptible to design or program changes.) Accordingly, when exporting or carrying abroad this product, follow the Foreign Exchange and Foreign Trade Control Law and its related regulations with respect to the complementary export controls. 4. The technical information described in this document shows typical characteristics and example application circuits for the products. The release of such information is not to be construed as a warranty of or a grant of license under our or any third party's intellectual property rights or any other rights. 5. The products listed in this document are intended and designed for use as general electronic components in standard applications (office equipment, telecommunication equipment, measuring instruments, consumer electronic products, amusement equipment etc.). Those customers intending to use a product in an application requiring extreme quality and reliability, for example, in a highly specific application where the failure or misoperation of the product could result in human injury or death should first contact us.
  • Aerospace Equipment
  • Equipment Used in the Deep Sea
  • Power Generator Control Equipment (nuclear, steam, hydraulic, etc.)
  • Life Maintenance Medical Equipment
  • Fire Alarms / Intruder Detectors
  • Vehicle Control Equipment (automotive, airplane, railroad, ship, etc.)
  • Various Safety Devices
  • Traffic control system
  • Combustion equipment In case your company desires to use this product for any applications other than general electronic equipment mentioned above, make sure to contact our company in advance. Note that the important requirements mentioned in this section are not applicable to cases where operation requirements such as application conditions are confirmed by our company in writing after consultation with your company. 6. We are making our continuous effort to improve the quality and reliability of our products, but semiconductor products are likely to fail with certain probability. In order to prevent any injury to persons or damages to property resulting from such failure, customers should be careful enough to incorporate safety measures in their design, such as redundancy feature, fire containment feature and fail-safe feature. We do not assume any liability or responsibility for any loss or damage arising from misuse or inappropriate use of the products. 7. The products have been designed and tested to function within controlled environmental conditions. Do not use products under conditions that deviate from methods or applications specified in this datasheet. Failure to employ the products in the proper applications can lead to deterioration, destruction or failure of the products. We shall not be responsible for any bodily injury, fires or accident, property damage or any consequential damages resulting from misuse or misapplication of the products. 8. Quality Warranty 8-1. Quality Warranty Period In the case of a product purchased through an authorized distributor or directly from us, the warranty period for this product shall be one (1) year after delivery to your company. For defective products that occurred during this period, we will take the quality warranty measures described in section 8-2. However, if there is an agreement on the warranty period in the basic transaction agreement, quality assurance agreement, delivery specifications, etc., it shall be followed. 8-2. Quality Warranty Remedies When it has been proved defective due to manufacturing factors as a result of defect analysis by us, we will either deliver a substitute for the defective product or refund the purchase price of the defective product. Note that such delivery or refund is sole and exclusive remedies to your company for the defective product. 8-3. Remedies after Quality Warranty Period With respect to any defect of this product found after the quality warranty period, the defect will be analyzed by us. On the basis of the defect analysis results, the scope and amounts of damage shall be determined by mutual agreement of both parties. Then we will deal with upper limit in Section 8-2. This provision is not intended to limit any legal rights of your company. 9. Anti-radiation design is not implemented in the products described in this document. 10. The X-ray exposure can influence functions and characteristics of the products. Confirm the product functions and characteristics in the evaluation stage. 11. WLCSP products should be used in light shielded environments. The light exposure can influence functions and characteristics of the products under operation or storage. 12. Warning for handling Gallium and Arsenic (GaAs) products (Applying to GaAs MMIC, Photo Reflector). These products use Gallium (Ga) and Arsenic (As) which are specified as poisonous chemicals by law. For the prevention of a hazard, do not burn, destroy, or process chemically to make them as gas or power. When the product is disposed of, please follow the related regulation and do not mix this with general industrial waste or household waste. 13. Please contact our sales representatives should you have any questions or comments concerning the products or the technical information. Official website https://www.nisshinbo-microdevices.co.jp/en/ Purchase information https://www.nisshinbo-microdevices.co.jp/en/buy/