NR301E

IO = 1 A, VIN = 27 V Linear Regulator IC NR301E, NR302A Data Sheet Description Packages NR301E and NR302A are linear regulator ICs whose maximum output current is 1 A. Output voltage is adjusted by external resistors. The IC uses the 8 pin surface mount package with exposed thermal pad. The IC has various functions including the Output On/Off Function, the Overcurrent Protection and the Thermal Shutdown, and achieves a linear regulator circuit with few external components. In addition, stable output voltage with ceramic capacitor reduces the mounting area compared to using electrolytic capacitors. NR301E: eSOIC8 NR302A: HSOP8 Features Not to scale Specifications ● Reducing Mounting Area Stable with a Ceramic Output Capacitor ● Adjustable Output Voltage (VOUT = 1.1 V to 16 V) ● Output On/Off Function ● Protections: Overcurrent Protection (OCP): Fold-back Thermal Shutdown (TSD) with Hysteresis: Autorestart ● ● ● ● Recomended Input Voltage, VIN: 2.7 V to 27 V Voltage Reference, VADJ: 1.0 V ± 1.5% Output Current, IO: 1.0 A Typical Dropout Voltage, VDIF: 0.6 V Applications ● Audio Visual Equipment ● Office Automation Equipment ● White Goods Typical Application NR301E NR302A 5 6 VIN 7 8 VC NC NC GND NC ADJ VIN VO 4 3 2 VOUT 1 R1 CIN D1 COUT R2 NR301E, NR302A-DSE Rev.2.1 SANKEN ELECTRIC CO., LTD May 25, 2022 http://www.sanken-ele.co.jp/en © SANKEN ELECTRIC CO., LTD. 2015 1 NR301E, NR302A Contents Description ------------------------------------------------------------------------------------------------------ 1 Contents --------------------------------------------------------------------------------------------------------- 2 1. Absolute Maximum Ratings----------------------------------------------------------------------------- 3 2. Recommended Operating Range ----------------------------------------------------------------------- 3 3. Electrical Characteristics -------------------------------------------------------------------------------- 4 4. Thermal Resistance Characteristics ------------------------------------------------------------------- 4 5. Mechanical Characteristics ----------------------------------------------------------------------------- 4 6. Performance Curves -------------------------------------------------------------------------------------- 5 7. Derating Curve -------------------------------------------------------------------------------------------- 6 8. Block Diagram --------------------------------------------------------------------------------------------- 7 9. Pin Configuration Definitions --------------------------------------------------------------------------- 7 10. Typical Application --------------------------------------------------------------------------------------- 8 11. Physical Dimensions -------------------------------------------------------------------------------------- 9 11.1. Land Pattern Example --------------------------------------------------------------------------- 10 12. Marking Diagram --------------------------------------------------------------------------------------- 10 13. Operational Description ------------------------------------------------------------------------------- 11 13.1. Constant Voltage Control------------------------------------------------------------------------ 11 13.2. Output Voltage Setting --------------------------------------------------------------------------- 11 13.3. Overcurrent Protection (OCP) ----------------------------------------------------------------- 11 13.4. TSD (Thermal Shutdown Protection) --------------------------------------------------------- 11 13.5. Output On/Off Function ------------------------------------------------------------------------- 12 14. Design Notes ---------------------------------------------------------------------------------------------- 12 14.1. Input and Output Capacitor -------------------------------------------------------------------- 12 14.2. Protection Diode for Reverse Biasing --------------------------------------------------------- 12 14.3. Considerations in Circuit Configuration ----------------------------------------------------- 13 15. Pattern Layout Example ------------------------------------------------------------------------------- 13 Important Notes ---------------------------------------------------------------------------------------------- 14 NR301E, NR302A-DSE Rev.2.1 SANKEN ELECTRIC CO., LTD May 25, 2022 http://www.sanken-ele.co.jp/en © SANKEN ELECTRIC CO., LTD. 2015 2 NR301E, NR302A 1. Absolute Maximum Ratings Unless otherwise specified, TA = 25 °C. Parameter Symbol VIN Pin Voltage VIN VC Pin Voltage VC ADJ Pin Voltage VADJ Conditions VC ≤ VIN The IC is mounted on the glass-epoxy board. See Figure 15-1. Rating Unit −0.3 to 30 V −0.3 to 30 V −0.3 to 5.0 V 2.27 W Power Dissipation PD Junction Temperature TJ −40 to 125 °C Storage Temperature Tstg −40 to 125 °C 2. Recommended Operating Range Parameter Symbol Min. Max. Unit VIN Pin Voltage* VIN 2.7 27 V Output Current* IOUT 0 1.0 A Output Voltage* VOUT 1.1 16 V Operating Ambient Temperature TOP(A) −30 85 °C Operating Junction Temperature TOP(J) −30 100 °C *Following equation shows the relationship between VIN, VOUT, and IOUT. Thus, Dropout Voltage (VIN − VOUT) or IOUT may be limited in some conditions. PD = (VIN − VOUT ) × IOUT NR301E, NR302A-DSE Rev.2.1 SANKEN ELECTRIC CO., LTD May 25, 2022 http://www.sanken-ele.co.jp/en © SANKEN ELECTRIC CO., LTD. 2015 3 NR301E, NR302A 3. Electrical Characteristics Current polarities are defined as follows: current going into the IC (sinking) is positive current (+); current coming out of the IC (sourcing) is negative current (−). Unless otherwise specified, TA = 25 °C, VIN = 6 V and VOUT = 5 V (R1 = 40 kΩ and R2 = 10 kΩ). Parameter Symbol Conditions Min. Typ. Max. Unit Reference Voltage VADJ Line Regulation ΔVLINE Load Regulation ΔVLOAD Dropout Voltage ΔVDIF Quiescent Current IQ Circuit Current during Regulator Output Off Output Voltage Temperature Coefficient IQ(OFF) ΔVOUT/ΔTA IOUT = 10 mA VIN = 6 V to 15 V, IOUT = 10 mA IOUT = 0 A to 1 A IOUT = 0.5 A IOUT = 1 A IOUT = 0 mA, VC = 2 V 0.985 1.00 1.015 V ― 25 50 mV ― ― ― 30 0.3 0.6 60 0.4 0.8 mV V V 0.5 0.9 1.6 mA VC = 0 V ― 0 1 μA TJ = 0 °C to 100 °C ― ±0.5 ― mV/°C ― 55 ― dB VC(H) VOUT = 5 V, IOUT = 0.1 A, f = 100 Hz to 120 Hz IOUT = 10 mA 2.0 ― ― V VC(L) IC(H) IC(L) IOUT = 10 mA VC = 2.0 V VC = 0 V ― ― −2 ― 4 0 0.6 40 0.1 V μA μA * 1.1 ― ― A TSD 135 155 ― °C TSD(HYS) ― 50 ― °C Ripple Rejection Ratio R.REJ VC Pin Voltage (Output On) VC Pin Voltage (Output Off) VC Pin Current (Output On) VC Pin Current (Output Off) Overcurrent Protection Operating Current Thermal Shutdown Operating Temperature Thermal Shutdown Temperature Hysteresis IS1 * After the Overcurrent Protection is activated, IS1 is measured when the output voltage decreases by 5% from the reference output voltage (IOUT = 10 mA). 4. Thermal Resistance Characteristics Parameter Thermal Resistance between Junction and Ambient Thermal Resistance between Junction and Lead* Symbol Conditions Min. Typ. Max. Unit θJ-A The IC is mounted on the glass-epoxy board. See Figure 15-1. — — 44 °C/W — 20 — °C/W Conditions Min. Typ. Max. Unit — 0.08 — g θJ-L * The lead temperature is measured at 3 pin (GND). 5. Mechanical Characteristics Parameter Package Weight NR301E, NR302A-DSE Rev.2.1 SANKEN ELECTRIC CO., LTD May 25, 2022 http://www.sanken-ele.co.jp/en © SANKEN ELECTRIC CO., LTD. 2015 4 NR301E, NR302A 6. Performance Curves VIN-Iｑ 1.8 1.6 IOUT = 0 A IOUT = 0.5 A 1.4 VOUT (V) IQ (mA) 1.2 1 0.8 0.6 IOUT = 1 A 0.4 0.2 0 0 5 10 15 20 25 30 VIN (V) VIN (V) Figure 6-1. Quiescent Current, IQ vs. Input Voltage, VIN Figure 6-2. Iout-VDIF VLINE 5.1 0.9 5.08 0.8 VOUT = 2.5 V 0.7 5.04 VOUT (V) VOUT = 5 V VOUT = 9 V 0.5 Iout=0A IOUT =0A 5.06 VOUT = 3.3 V 0.6 VDIF (V) Output Voltage, VOUT vs. Input Voltage, VIN 0.4 0.3 5.02 5 4.98 4.96 0.2 4.94 VOUT = 15 V 0.1 4.92 0 4.9 0 0.2 0.4 0.6 0.8 1 0 5 IOUT (A) Figure 6-3. 10 15 20 VIN (V) Dropout Voltage, VDIF vs. Output Current, IOUT Figure 6-4. Line Regulation VLOAD 5.04 6 5.03 Vin=10v VIN =6v 10 V 5.02 4 VOUT (V) VOUT (V) 5.01 5 5 4.99 4.98 4.97 VIN = 6 V 4.96 Vin=6v VIN = 10 V 10v 3 2 VIN = 6 V 1 4.95 0 4.94 0 0.2 0.4 0.6 0.8 1 0 IO (A) Figure 6-5. Load Regulation 0.5 1 1.5 2 IO (A) Figure 6-6. NR301E, NR302A-DSE Rev.2.1 SANKEN ELECTRIC CO., LTD May 25, 2022 http://www.sanken-ele.co.jp/en © SANKEN ELECTRIC CO., LTD. 2015 Overcurrent Protection Characteristics 5 NR301E, NR302A Vc-Vo TSD 6 5 5 4 4 VOUT (V) VOUT (V) 6 3 2 1 3 2 1 0 0 0 0.5 1 1.5 2 2.5 3 0 20 VC (V) Figure 6-7. 7. 40 60 80 100 120 140 160 180 TJ (°C) VC Pin Output On/Off Characteristics Figure 6-8. Thermal Shutdown Characteristics Derating Curve 2.5 PD (W) 2.0 1.5 1.0 0.5 0.0 -30 -20 -10 0 Figure 7-1. 10 20 30 40 50 60 70 80 90 100 110 120 130 TA (°C) Allowable Power Dissipation, PD vs. Ambient Temperature, TA NR301E, NR302A-DSE Rev.2.1 SANKEN ELECTRIC CO., LTD May 25, 2022 http://www.sanken-ele.co.jp/en © SANKEN ELECTRIC CO., LTD. 2015 6 NR301E, NR302A 8. Block Diagram VIN Vin 8 VO 1 Vout OCP Drv BGRef BG Ref. VCVc 5 2 ADJ ADJ OTA + Vadj VADJ Vc + - 22V/0.6V V / 0.6 V + OVP TSD - NC 6 NC - 1.1Vadj 1.1×VADJ Hys50℃ Hysteresis 50 °C GND GND 3 NC 4 NC + 155 °C 155℃ NC 7 NC NR301E Block Diagram 9. Pin Configuration Definitions VO 1 ADJ 2 GND 3 NC 4 PAD Pin Number Pin Name Function 8 VIN 1 VO Voltage output 7 NC 2 ADJ Output voltage setting resistor connection 6 NC 3 GND Ground 5 VC 4 NC 5 VC 6 NC (No connection) Output on/off signal input (When the Output On/Off Function is disabled, VC pin must be connected to stable potential.) (No connection) 7 NC (No connection) 8 VIN (Back Side) PAD Supply input Exposed pad for heat release (The thermal pad must be soldered to copper trace on PCB, and be connected to the GND pin.) NR301E, NR302A-DSE Rev.2.1 SANKEN ELECTRIC CO., LTD May 25, 2022 http://www.sanken-ele.co.jp/en © SANKEN ELECTRIC CO., LTD. 2015 7 NR301E, NR302A 10. Typical Application NR301E NR302A 5 6 R3 7 VIN 8 U1 VC NC NC GND NC ADJ VIN VO 4 3 2 VOUT 1 R1 CIN D1 COUT R2 Figure 10-1. Typical Application (Output On/Off Function Disabled) Table 10-1. Reference Value of External Components (When VIN = 6 V and VOUT = 5 V.) Symbol Part Type Reference Value CIN Ceramic capacitor 1 μF COUT Ceramic capacitor 1 μF R1 Resistor 40 kΩ Remarks Place CIN close to the IC. CIN should be connected to the VIN and GND pins with short traces. Place COUT close to the IC. COUT should be connected to the VO and GND pins with short traces. Adjust resistance based on the output voltage. R2 Resistor 10 kΩ For the resistance setting, see Section 13.2. R3 Resistor 0Ω D1 Diode Option For the resistance setting, see Section 13.5. If the condition of VIN < VO is included in the power supply application, it is required to add D1. NR301E, NR302A-DSE Rev.2.1 SANKEN ELECTRIC CO., LTD May 25, 2022 http://www.sanken-ele.co.jp/en © SANKEN ELECTRIC CO., LTD. 2015 8 NR301E, NR302A 11. Physical Dimensions ● eSOIC8 Package (NR301E) Symbol A1 A2 b D D1 E E1 E2 e L Min. 0 1.25 0.38 4.80 3.10 5.80 3.80 2.20 — 0.45 Typ. 0.10 1.40 — 4.90 3.30 6.00 3.90 2.40 1.27 0.60 Max. 0.15 1.65 0.51 5.00 3.50 6.20 4.00 2.60 — 0.80 NOTES: - Dimensions in millimeters - Bare lead frame and pad: Pb-free (RoHS compliant) - Dimensions do not include mold burrs. ● HSOP8 Pakage (NR302A) NOTES: - Dimensions in millimeters - Bare lead frame and pad: Pb-free (RoHS compliant) NR301E, NR302A-DSE Rev.2.1 SANKEN ELECTRIC CO., LTD May 25, 2022 http://www.sanken-ele.co.jp/en © SANKEN ELECTRIC CO., LTD. 2015 9 NR301E, NR302A 11.1. Land Pattern Example 0.61 1.27 1.60 2.66 5.40 3.56 NOTE: Dimensions in millimeters 12. Marking Diagram 8 NR30xx Part Number (NR301E or NR302A) SKYMW 1 Lot Number: Y is the last digit of the year of manufacture (0 to 9) M is the month of the year (1 to 9, O, N, or D) W is the week of the month (1 to 5) Control Number NR301E, NR302A-DSE Rev.2.1 SANKEN ELECTRIC CO., LTD May 25, 2022 http://www.sanken-ele.co.jp/en © SANKEN ELECTRIC CO., LTD. 2015 10 NR301E, NR302A VIN 13. Operational Description All the characteristic values given in this section are typical values, unless they are specified as minimum or maximum. U1 8 VIN VOUT 1 VO R1 ADJ CIN GND 3 2 R2 COUT 13.1. Constant Voltage Control The IC is with the circuit including the reference voltage, the error amplifier, and P channel power MOSFET. The drain-to-source voltage of the P channel MOSFET is under linear control so that the ADJ pin voltage becomes equal to the reference voltage by the internal error amplifier. As a result, the constant output voltage is provided. The power loss of the IC is obtained from the product of the drain-to-source voltage (Dropout Voltage) by the output voltage. Note that the thermal design must be taken into account. 13.2. Output Voltage Setting Output Voltage is adjusted by external resistors, R1 and R2. The setting resisters are connected to the ADJ pin as shown in Figure 13-1. The feedback signal for the output voltage setting inputs to the ADJ pin. Other signal must not input to the ADJ pin. The feedback current through R1 and R2 should be set about 100 μA. The reference voltage of the ADJ pin, VADJ, is 1.00 V. R2 value is calculated by Equation (1). R2 = VADJ 1.00 V = = 10 kΩ 100 μA 100 μA (1) Output voltage, VOUT, is calculated by the following equation. VOUT = R1 + R2 × VADJ . R2 (2) Thus, R1 is calculated by using Equation (3). R1 = R2 × (VOUT − VADJ ) VADJ ＝ 10 kΩ × (VOUT − 1.00 V) 1.00 V Figure 13-1. ADJ Pin Peripheral Circuit 13.3. Overcurrent Protection (OCP) The IC has Overcurrent Protection (OCP) with the fold-back characteristic that the output current at the short circuit load (VOUT = 0 V) is smaller than it at OCP activation (see Figure 6-6). The IC loss at the short circuit load (VIN × IO) is less than constant current or fold-forward characteristic. When the IC starts at the output capacitor voltage of 0 V, the output current is limited by OCP; and output voltage gradually increases. 13.4. TSD (Thermal Shutdown Protection) The IC has the Thermal Shutdown (TSD) with hysteresis. When the junction temperature of the IC increase to TSD = 155 °C or more, TSD is activated, and turns off the internal p channel power MOSFET to shutdown the load current. The temperature hysteresis of TSD is about 50 °C. When the junction temperature decreases to about 100 °C after the load current shutdown, the IC restarts the constant voltage control. Since the TSD may be activated at the junction temperature of 135 °C that is the minimum characteristics for TSD, it is required to design the heat release so that TSD is not activated in normal operation (junction temperature must be below 125 °C). The TSD protects the IC against the heat generation when the loss of the IC increases due to the instantaneous short-circuit of the load. This does not guarantee the operation including the reliability in the short-circuit state for long period or the state where the heat generation continues. (3) If the calculation result does not match the E series, adjustment resistors should be added in series or parallel to R1. NR301E, NR302A-DSE Rev.2.1 SANKEN ELECTRIC CO., LTD May 25, 2022 http://www.sanken-ele.co.jp/en © SANKEN ELECTRIC CO., LTD. 2015 11 NR301E, NR302A 13.5. Output On/Off Function 14. Design Notes The output is turned on/off by the input signal to the VC pin. When VC ≥ VC(H), the output is supplied. When VC ≤ VC(L), the output is shutdown. Where, VC is the VC pin voltage, VC(H) = 2 V (min.), and VC(L) = 0.6 V (max.). The VC pin is pulled down by internal high impedance resistor for the power dissipation reduction. If the VC pin is open, its input status may be unstable; and the malfunction may be caused. To disable the Output On/Off Function, the VC pin must be connected to the VIN pin. As shown in Figure 13-2 and Figure 13-3, the on/off signal is generated by a general-purpose logic IC or a transistor, and inputs to the VC pin. When the generalpurpose logic IC is used, pull-up resistor, R3, is unnecessary. In the case of Figure 13-3, the R3 value should satisfy Equation (4) that the maximum sink current of the VC pin is taken into account. The minimum value of R3 should be set taking into account the loss of the transistor. R3 < VIN − VC(H) (min. ) IC(H) (max. ) (4) Where VIN is input voltage, VC(H)(min.) is minimum specification of VC(H) (= 2 V), and IC(H)(max.) is minimum specification of IC(H) (= 40 μA). U1 8 VIN 5 TTL-Logic VIN VO 1 VOUT 14.1. Input and Output Capacitor Input capacitor, CIN, and output capacitor, COUT, must be used low ESR and high DC bias characteristics. Since the capacitance has variation and temperature characteristics, it should be set taking into account enough margins. If the traces between CIN and the VIN pin, and between COUT and the VO pin are long, the power supply impedance is high. For stable operation, CIN and COUT must be placed close to the VIN pin and VO pin respectively, and be connected to each pin with short trace. ● CIN Setting: Use ceramic capacitor of ≥1 μF or electrolytic capacitor of about 22 μF. Be sure to confirm the actual operation and set the capacitance. When electrolytic capacitor is used, it is required to connect a ceramic capacitor between the VIN and GND pins. The ceramic capacitor should be connected close to these pins (The power supply including electrolytic capacitor operates stable in normal temperature, but it may operate unstable in low temperature due to the effect of the temperature characteristic of ESR). ● COUT Setting: Use ceramic capacitor of ≥1 μF. The output voltage can be stable with ceramic capacitor whose mounting area is small, because the phase compensation circuit is built in the IC. VC GND 3 14.2. Protection Diode for Reverse Biasing Ground Figure 13-2. Output On/Off Function (In the Case of General-purpose Logic IC) If the condition of VIN < VO is included in the power supply application (ex. the dynamic changing in input voltage), a protection diode, D1, must be connected between the VIN pin and the VO pin (see Figure 10-1). U1 8 VIN R3 VO 1 VIN VOUT 5 VC GND 3 Ground Figure 13-3. Output On/Off Function (In the Case of Transistor) NR301E, NR302A-DSE Rev.2.1 SANKEN ELECTRIC CO., LTD May 25, 2022 http://www.sanken-ele.co.jp/en © SANKEN ELECTRIC CO., LTD. 2015 12 NR301E, NR302A 14.3. Considerations in Circuit Configuration 15. Pattern Layout Example The overcurrent protection of the IC has the fold-back characteristic. To avoid startup failure, do not use the circuit configurations as follows: ● ● ● ● The IC has an exposed pad to improve its heat releasing capability. The exposed pad must be soldered to copper trace on PCB. Constant current circuit is connected to the IC. CV/CC circuit is connected to the IC. Load 2 is stacked on Load 1 (see in Figure 14-1). The output voltage setting resistor is connected between the GND pin and Ground (see Figure 14-2). U2 VIN VO GND Load 2 U1 VIN VO GND Load 1 (Top View) Figure 14-1. Stacked on Loads (Do not connect Load 2.) U1 VIN VIN VO GND R1 Load R2 Ground Figure 14-2. Output Voltage Setting (Do not connect R2.) (Bottom View) Remarks: - Double-sided PCBs with through-hole: FR4 Thickness of the glass-epoxy board: 1.6 mm Area: 40 mm × 40 mm Copper thickness: 35 μm Figure 15-1. NR301E, NR302A-DSE Rev.2.1 SANKEN ELECTRIC CO., LTD May 25, 2022 http://www.sanken-ele.co.jp/en © SANKEN ELECTRIC CO., LTD. 2015 PCB Pattern Layout Example 13 NR301E, NR302A Important Notes ● All data, illustrations, graphs, tables and any other information included in this document (the “Information”) as to Sanken’s products listed herein (the “Sanken Products”) are current as of the date this document is issued. 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When considering use of the Sanken Products for any applications that require higher reliability (such as transportation equipment and its control systems, traffic signal control systems or equipment, disaster/crime alarm systems, various safety devices, etc.), you must contact a Sanken sales representative to discuss the suitability of such use and put your signature, or affix your name and seal, on the specification documents of the Sanken Products and return them to Sanken, prior to the use of the Sanken Products. The Sanken Products are not intended for use in any applications that require extremely high reliability such as: aerospace equipment; nuclear power control systems; and medical equipment or systems, whose failure or malfunction may result in death or serious injury to people, i.e., medical devices in Class III or a higher class as defined by relevant laws of Japan (collectively, the “Specific Applications”). 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DSGN-CEZ-16003 NR301E, NR302A-DSE Rev.2.1 SANKEN ELECTRIC CO., LTD May 25, 2022 http://www.sanken-ele.co.jp/en © SANKEN ELECTRIC CO., LTD. 2015 14