Light Load High Efficiency, 31V, Buck Regulator NR110E series Jun. 21, 2016 Package General Descriptions The NR110E series is buck regulator ICs integrates High-side power MOSFET. The feature increasing efficiency at light loads allows the device to be used in the energy-saving applications. With the current mode control, ultra low ESR capacitors such as ceramic capacitors can be used. The ICs have protection functions such as Over-Current Protection (OCP), Under-Voltage Lockout (UVLO) and Thermal Shutdown (TSD). An adjustable Soft-Start by an external capacitor prevents the excessive inrush current at turn-on. The ICs integrate phase compensation circuit which reduces the number of external components and simplifies the design of customer application. The ON/OFF pin (EN Pin) turns the regulator on or off and helps to achieve low power consumption requirements. The NR110E series is available in an 8-pin SOIC package with an exposed thermal pad on the back side. Features & Benefits Current mode PWM control Up to 94% Efficiency, Up to 68% Efficiency at IO = 20mA Light Load Adjustable “Over Current Protection（OCP）” Current mode PWM control Stable with low ESR ceramic output capacitors Built-in protection function Over Current Protection (OCP) Thermal Shutdown (TSD) Under Voltage Lockout (UVLO) Built-in phase compensation Adjustable Soft-Start with an external capacitor Turn ON/OF the regulator function Exposed SOIC 8 Thermally enhanced 8-Pin package Electrical Characteristics Operating input range VIN = 6.5V～31V Output adjustable VO= 0.8V～24V 2A / 4A output current Fixed 350kHz frequency：NR111E Fixed 364kHz frequency：NR119E Applications LCD TV / Blu-Ray / Set top box Home appliance Green Electronic products Other power supply Typical Application Circuit C1, C2: 10μF / 35V C4, C5: 22μF / 16V C7: 0.1μF C3: 0.1μF Rev.1.4 R1: 510kΩ L1: 10μH R3: 22Ω(*Option) D1: SJPW-T4(Sanken) R4: 18kΩ, R5: 2.7kΩ (Vo=5.0V) R6: 3.9kΩ R9:adjust SANKEN ELECTRIC CO., LTD. http://www.sanken-ele.co.jp 1 Light Load High Efficiency, 31V, Buck Regulator NR110E series Jun. 21, 2016 Series Lineup Product No. fSW VIN NR111E 350kHz VO (1) 6.5V to 31V 0.8V to 24V IO 4A (2) NR119E 364kHz The minimum input voltage shall be either of 6.5V or VO+3V, whichever is higher. (2) The I/O condition limited by the Minimum on-time (TON(MIN)). 2A (1) Absolute Maximum Ratings Parameter Symbol Ratings Units DC input voltage VIN 35 V BS Pin voltage VBS 44 V VBS-SW 8 V SW Pin voltage VSW 35 V FB Pin voltage VFB 5.5 V EN Pin voltage VEN 35 V SS Pin voltage VSS 5.5 V BS-SW Pin voltage Power dissipation (3) PD 1.76 W Junction temperature (4) TJ 40 to 150 °C Glass-epoxy board mounting in 30×30mm. (copper area in a 25×25mm) Max TJ =150°C Storage temperature Thermal resistance (junction- Pin No. 4) TS 40 to 150 °C θJP 26 °C /W Thermal resistance (junction-ambient air) θJA 71 °C /W (3) (4) Conditions Glass-epoxy board mounting in 30×30mm. (copper area in 25×25mm) Limited by thermal shutdown. The temperature detection of thermal shutdown is about 160°C Recommended Operating Conditions Parameter Symbol (5) DC input voltage DC output current Output voltage NR111E NR119E VIN (6) (7) Io Vo Ratings MIN MAX 6.5 31 0 4.0 0 2.0 0.8 24 Units Conditions V A V (7) Ambient operating temperature Top 85 °C 40 The minimum value of input voltage is taken as the larger one of either 6.5V or VO +3V. (6) Recommended circuit refers to Typical Application Circuit. (7) To be used within the allowable package power dissipation characteristics. (5) Rev.1.4 SANKEN ELECTRIC CO., LTD. http://www.sanken-ele.co.jp 2 Light Load High Efficiency, 31V, Buck Regulator NR110E series Jun. 21, 2016 Electrical Characteristics Ta = 25°C Parameter Symbol Reference voltage Output voltage temperature coefficient Switching frequency NR111E MIN TYP MAX VREF 0.784 0.800 0.816 ⊿VREF/⊿T ― ±0.05 ― 280 350 420 291 364 437 fSW NR119E Ratings Units Test conditions V VIN = 12V, IO = 1.0A V = 12V, IO = 1.0A mV/°C IN 40°C to +85°C kHz VIN=12V, VO=5.0V, IO=1° VIN=8V to31V, VO =5.0V, IO=1° VIN=12V, VO=5.0V, IO=0.1 to 2.0A VIN =12V, VO =5.0V ISET=OPEN VIN =12V, VO =5.0V ISET=SHORT VIN=12V, VO =5.0V ISET=OPEN VIN =12V, VO =5.0V ISET=SHORT VIN = 12V VEN=10kΩ pull up to VIN VIN =12V, IO =0A, VEN=0V Line regulation (8) VLine ― 50 ― mV Load regulation (8) VLoad ― 50 ― mV IS1 ― 1.5 ― IS2 ― 5.5 ― IS1 ― 0.9 ― IS2 ― 2.8 ― IIN ― 1 ― mA IIN(off) 0 1 ― μA IEN/SS 6 10 14 μA VSS=0V, VIN =12V 20 50 μA VEN= 10V 1.4 2.1 V VIN =12V V VIN =12V NR111E Over current protection starting current A NR119E Supply Current Shutdown Supply Current SS Pin EN Pin ISET Pin Source current at low level voltage Sink current Threshold voltage VC/EH Open voltage Max on-duty Minimum on-time NR111E NR119E Thermal shutdown threshold temperature Thermal shutdown restart hysteresis of temperature (8) Guaranteed by design, not tested. Rev.1.4 IEN 0.7 VISET (8) DMAX (8) TON(MIN) 1.5 ― 90 ― ― 150 ― ― 150 ― % ns (8) TSD 151 165 ― °C (8) TSD_hys ― 20 ― °C SANKEN ELECTRIC CO., LTD. http://www.sanken-ele.co.jp 3 Light Load High Efficiency, 31V, Buck Regulator NR110E series Jun. 21, 2016 Typical Performance Characteristics NR111E Typical Performance Characteristics Efficiency Efficiency η [%] VO=3.3V VIN=12V 15V 18V 20V 24V Output Current IO [A] Efficiency η [%] VO=5.0V VIN=12V 15V 18V 20V 24V Output Current IO [A] Rev.1.4 SANKEN ELECTRIC CO., LTD. http://www.sanken-ele.co.jp 4 Light Load High Efficiency, 31V, Buck Regulator NR110E series Jun. 21, 2016 NR111E Typical Performance Characteristics Over Current Protection VO=5.0V Output Voltage [V] Output Voltage VO [V] Output startup VO=5.0V, Load = Constant Resistance VIN=12V 15V 18V 20V 24V ISET=GND ISET=OPEN Output Current IO [A] Input Voltage VIN [V] Switching Frequency: fSW Load Regulation: VLoad VO=5.0V Output Voltage [V] Switching frequency [kHz] VO=5.0V Output Current IO [A] Output Current IO [A] Shutdown Supply Current: IIN(off) Supply Current: IIN NR114K/115K,NR116K,NR117K IQ VO=5.0V 5.0 Iin [mA] Current [mA] Supply Shutdown Supply Current [mA] VEN=0V 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0.0 5.0 Input Voltage VIN [V] Rev.1.4 10.0 15.0 20.0 25.0 30.0 Output Current VIN[V] IO [A] SANKEN ELECTRIC CO., LTD. http://www.sanken-ele.co.jp 5 Light Load High Efficiency, 31V, Buck Regulator NR110E series Jun. 21, 2016 Functional Block Diagram Pin Assignments & Functions Pin Assignments Pin Functions Pin No. Symbol 1 BS 2 IN 3 SW 4 GND 5 FB 6 ISET Description High-side Boost input. BS supplies the drive for High-side Nch-MOSFET switch. Connect a capacitor and a resistor between SW to BS. Power input. IN supplies the power to the IC as well as the regulator switches Power switching output. SW supplies power to the output. Connect the LC filter from SW to the output. Note that a capacitor is required from SW to BS to supply the power the High-side switch Ground Connect the exposed pad to Pin No.4 Feedback input Pin to compare Reference Voltage. The feedback threshold is 0.8V. To set the output voltage, FB Pin is required to connect between resistive voltage divider R4 and R6. Adjust Pin of OCP starting current OCP starting current can be adjusted by connecting a resistor to ISET Pin. In the case of using at Maximum Io, ISET Pin is required to connect to GND. Rev.1.4 7 EN 8 SS Enable input. Drive EN Pin high to turn on the regulator, low to turn it off. Soft-Start control input. To set the soft-start period, connect to a capacitor between GND. SANKEN ELECTRIC CO., LTD. http://www.sanken-ele.co.jp 6 Light Load High Efficiency, 31V, Buck Regulator NR110E series Jun. 21, 2016 External Components Design Guide (1)Diode D1 ・The Schottky-barrier diode must be used for D1. If other diodes like fast recovery diodes are used, IC may be damaged because of the reverse voltage applied by the recovery voltage or ON voltage. (2)Choke coil L1 ・If the winding resistance of the choke coil is too high, the efficiency may go down to the extent that it is out of the rating. ・As the start current of the over current protection is approximately 4A, attention must be paid to the heating of the choke coil by the magnetic saturation due to overload or short-circulated load. (3)Capacitor C1 (C2), C4 (C5), C7 ・As large ripple current across C1 (C2) and C4 (C5), capacitors with high frequency and low impedance for SMPS must be used. Especially when the impedance of C4 (C5) is high, the switching waveform may not be normal at low temperature. ・C7 is a capacitor for soft start. A soft-start controls the over-shoot of the output voltage rising and rush current. (4)Resistor R1, R2 ・R4, R5, R6 are resistor to the Output Voltage. IADJ is required to set to 0.2mA. R4, R5, R6 are calculated by the equation (1). R 4 R5 VO VFB VO 0.8 I ADJ 0.2 10 3 ， R 6 VFB 0.8 ≒ 4.0k I ADJ 0.2 10 3 ------- (1) In order to have optimum operating condition, each component must be connected with the minimum distance. Rev.1.4 SANKEN ELECTRIC CO., LTD. http://www.sanken-ele.co.jp 7 Light Load High Efficiency, 31V, Buck Regulator NR110E series Jun. 21, 2016 Allowable package power dissipation NOTES 1) Glass-epoxy board mounting in a 30×30mm 2) Copper area: 25×25mm 3) The power dissipation is calculated at the junction temperature 125 °C 4) Losses can be calculated by the following equation. As the efficiency is subject to the input voltage and output current, it shall be obtained from the efficiency curve and substituted in percent 5) Thermal design for D1 shall be made separately. 100 V PD VO I O 1 VF I O 1 O x VIN VO: Output voltage VIN: Input voltage IO: Output current ηx: Efficiency(%) VF: Diode forward voltage SJPB-L4…0.55V(IO=3A) Rev.1.4 SANKEN ELECTRIC CO., LTD. http://www.sanken-ele.co.jp 8 Light Load High Efficiency, 31V, Buck Regulator NR110E series Jun. 21, 2016 PCB Layout Example & Recommended Land Pattern (1)Each ground of all components is connected as close as possible to the Pin No.1 at one point. (2) To help heat dissipation, connect a large copper plane to exposed pad on the back side of the package. The copper plane is required for GND Front Side: Component Side (double sided board) Back Side: GND Side (double sided board) NOTES: Real size of the PCB is 60mm×60mm (Demo-board circuit-diagram) NR111E NR119E As for the part number of the demonstration board "circuit-diagram", a circuit board concerned doesn't partly fit each other with the above application circuit example and so on for NR110, NR120 and the NR880 series common use. Approve it in advance. C9, R9 and C10 aren't used in the NR110 series. And, D2, R3, R8, R10, C11 and C12 are options. *Mount ISET setup resistor R9 on the position of C10. Rev.1.4 SANKEN ELECTRIC CO., LTD. http://www.sanken-ele.co.jp 9 Light Load High Efficiency, 31V, Buck Regulator NR110E series Jun. 21, 2016 NOTES: 1) Dimension is in millimeters, dimension in bracket is in inches. 2) Drawing is not to scale. Recommended land pattern Rev.1.4 SANKEN ELECTRIC CO., LTD. http://www.sanken-ele.co.jp 10 Light Load High Efficiency, 31V, Buck Regulator NR110E series Jun. 21, 2016 Package Outline Exposed SOIC8 package An outside size is supplied by either Package type A or Package type B. Package outline, dimensions Symbol A1 A2 b D D1 E E1 E2 e L MIN 0 1.398 0.330 4.80 3.053 5.893 3.73 2.033 － 0.508 Package A TYP － 1.448 － 4.902 3.18 － － 2.16 1.27 － MAX 0.1524 1.498 0.508 5.004 3.307 6.198 3.89 2.287 － 0.762 MIN 0 1.25 0.38 4.80 3.10 5.80 3.80 2.20 － 0.45 Package B 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: 1) Dimension is in millimeters, dimension in bracket is in inches. 2) Drawing is not to scale. 3) Pb-free: Device composition comply with the RoHS directive. Rev.1.4 SANKEN ELECTRIC CO., LTD. http://www.sanken-ele.co.jp 11 Light Load High Efficiency, 31V, Buck Regulator NR110E series Jun. 21, 2016 Package Marking NR111E SKYMW XXXX Part Number Lot Number Y= last digit of the year (0-9) M= Month (1-9, O, N, or D) W= Week Code (1-3) Sanken Control Number Rev.1.4 SANKEN ELECTRIC CO., LTD. http://www.sanken-ele.co.jp 12 Light Load High Efficiency, 31V, Buck Regulator NR110E series Jun. 21, 2016 IMPORTANT NOTES ● All data, illustrations, graphs, tables and any other information included in this document as to Sanken’s products listed herein (the “Sanken Products”) are current as of the date this document is issued. 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DSGN-CEZ-16001 Rev.1.4 SANKEN ELECTRIC CO., LTD. http://www.sanken-ele.co.jp 13