NCP137 700 mA, Very Low Dropout Bias Rail CMOS Voltage Regulator The NCP137 is a 700 mA VLDO equipped with NMOS pass transistor and a separate bias supply voltage (VBIAS). The device provides very stable, accurate output voltage with low noise suitable for space constrained, noise sensitive applications. In order to optimize performance for battery operated portable applications, the NCP137 features low IQ consumption. The WLCSP6 1.2 mm x 0.8 mm Chip Scale package is optimized for use in space constrained applications. www.onsemi.com MARKING DIAGRAM WLCSP6, 1.2x0.8 CASE 567MV Features * * * * * * * * * * * * * XXMG XX = Specific Device Code M = Month Code G = Pb-Free Package Input Voltage Range: VOUT to 5.5 V Bias Voltage Range: 2.5 V to 5.5 V Adjustable and Fixed Voltage Version Available Output Voltage Range: 0.4 V to 1.8 V (Fixed) and Output Voltage Range: 0.5 V to 3.0 V (Adjustable) 1% Accuracy over Temperature, 0.5% VOUT @ 25C Ultra-Low Dropout: Typ. 40 mV at 700 mA Very Low Bias Input Current of Typ. 35 mA Very Low Bias Input Current in Disable Mode: Typ. 0.5 mA Logic Level Enable Input for ON/OFF Control Output Active Discharge Option Available Stable with a 4.7 mF Ceramic Capacitor Available in WLCSP6 - 1.2 mm x 0.8 mm, 0.4 mm pitch Package These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS Compliant PIN CONNECTIONS 1 2 A VOUT VIN B SNS/FB EN C GND VBIAS Typical Applications * Battery-powered Equipment * Smartphones, Tablets * Cameras, DVRs, STB and Camcorders Top View ORDERING INFORMATION See detailed ordering, marking and shipping information on page 7 of this data sheet. VBIAS 2.5 V VBIAS 2.5 V BIAS VIN 1.02 V 4.7 mF VOUT 0.9 V up to 700 mA NCP137 - ADJ 1 mF EN BIAS OUT R1 IN FB GND VIN 1.02 V 4.7 mF 4.7 mF R2 VEN VOUT 0.9 V up to 700 mA NCP137 1 mF OUT IN EN SNS 10 mF GND VEN Figure 1. Typical Application Schematics (c) Semiconductor Components Industries, LLC, 2016 September, 2018 - Rev. 5 1 Publication Order Number: NCP137/D NCP137 CURRENT LIMIT IN EN BIAS OUT ENABLE BLOCK 150 W *Active DISCHARGE UVLO 0.50 V VOLTAGE REFERENCE + THERMAL LIMIT - FB GND *Active output discharge function is present only in NCP137A option devices. Figure 2. Simplified Schematic Block Diagram - Adjustable Version CURRENT LIMIT IN EN BIAS OUT ENABLE BLOCK 150 W *Active DISCHARGE UVLO VOLTAGE REFERENCE + - THERMAL LIMIT SNS GND *Active output discharge function is present only in NCP137A option devices. Figure 3. Simplified Schematic Block Diagram - Fixed Version www.onsemi.com 2 NCP137 PIN FUNCTION DESCRIPTION Pin No. WLCSP6 Pin Name A1 VOUT A2 VIN Input Voltage Supply pin B1 (ADJ devices) FB Adjustable Regulator Feedback Input. Connect to output voltage resistor divider central node. B1 (Fix Volt devices) SNS B2 EN C1 GND C2 VBIAS Description Regulated Output Voltage pin Output voltage Sensing Input. Connect to Output on the PCB to output the voltage corresponding to the part version. Enable pin. Driving this pin high enables the regulator. Driving this pin low puts the regulator into shutdown mode. Ground pin Bias voltage supply for internal control circuits. This pin is monitored by internal Under-Voltage Lockout Circuit. ABSOLUTE MAXIMUM RATINGS Rating Symbol Input Voltage (Note 1) Value Unit VIN -0.3 to 6 V VOUT -0.3 to (VIN+0.3) 6 V VEN, VBIAS, VFB, VSNS -0.3 to 6 V Output Short Circuit Duration tSC unlimited s Maximum Junction Temperature TJ 150 C TSTG -55 to 150 C ESD Capability, Human Body Model (Note 2) ESDHBM 2000 V ESD Capability, Machine Model (Note 2) ESDMM 200 V Output Voltage Chip Enable, Bias, FB and SNS Input Storage Temperature Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. 1. Refer to ELECTRICAL CHARACTERISTICS and APPLICATION INFORMATION for Safe Operating Area. 2. This device series incorporates ESD protection (except OUT pin) and is tested by the following methods: ESD Human Body Model tested per EIA/JESD22-A114 ESD Machine Model tested per EIA/JESD22-A115 Latchup Current Maximum Rating tested per JEDEC standard: JESD78. THERMAL CHARACTERISTICS Rating Thermal Characteristics, WLCSP6 1.2 mm x 0.8 mm Thermal Resistance, Junction-to-Air (Note 3) Symbol Value Unit RqJA 69 C/W 3. This junction-to-ambient thermal resistance under natural convection was derived by thermal simulations based on the JEDEC JESD51 series standards methodology. Only a single device mounted at the center of a high_K (2s2p) 80 mm x 80 mm multilayer board with 1-ounce internal planes and 2-ounce copper on top and bottom. Top copper layer has a dedicated 1.6 sqmm copper area. www.onsemi.com 3 NCP137 ELECTRICAL CHARACTERISTICS -40C TJ 85C; VBIAS = 2.7 V or (VOUT + 1.6 V), whichever is greater, VIN = VOUT(NOM) + 0.3 V, IOUT = 1 mA, VEN = 1 V, CIN = 4.7 mF, COUT = 10 mF, CBIAS = 1 mF, unless otherwise noted. Typical values are at TJ = +25C. Min/Max values are for -40C TJ 85C unless otherwise noted. (Notes 4, 5) Test Conditions Symbol Min Operating Input Voltage Range VIN Operating Bias Voltage Range VBIAS Parameter Typ Max Unit VOUT + VDO 5.5 V (VOUT + 1.50) 2.5 5.5 V Undervoltage Lock-out VBIAS Rising Hysteresis UVLO 1.6 0.2 V Reference Voltage (Adj devices) TJ = +25C VREF 0.500 V VOUT 0.5 % Output Voltage Accuracy Output Voltage Accuracy -40C TJ 85C, VOUT(NOM) + 0.3 V VIN VOUT(NOM) + 1.0 V, 2.7 V or (VOUT(NOM) + 1.6 V), whichever is greater < VBIAS < 5.5 V, 1 mA < IOUT < 700 mA VOUT VIN Line Regulation VOUT(NOM) + 0.3 V VIN 5.0 V LineReg 0.01 %/V VBIAS Line Regulation 2.7 V or (VOUT(NOM) + 1.6 V), whichever is greater < VBIAS < 5.5 V LineReg 0.01 %/V Load Regulation IOUT = 1 mA to 700 mA LoadReg 1.5 mV VIN Dropout Voltage IOUT = 700 mA (Notes 6, 7) VDO 40 60 mV VBIAS Dropout Voltage IOUT = 700 mA, VIN = VBIAS (Notes 6, 8, 9) VDO 1.1 1.5 V Output Current Limit VOUT = 90% VOUT(NOM) ICL 1200 1500 mA IFB, ISNS 0.1 0.5 mA IBIASQ 35 50 mA FB/SNS Pin Operating Current -1.0 800 +1.0 % Bias Pin Quiescent Current VBIAS = 2.7 V, IOUT = 0 mA Bias Pin Disable Current VEN 0.4 V IBIAS(DIS) 0.5 1 mA Vinput Pin Disable Current VEN 0.4 V IVIN(DIS) 0.5 1 mA EN Pin Threshold Voltage EN Input Voltage "H" VEN(H) EN Input Voltage "L" VEN(L) V 0.9 0.4 EN Pull Down Current VEN = 5.5 V IEN 0.3 1 Turn-On Time From assertion of VEN to VOUT = 98% VOUT(NOM). VOUT(NOM) = 1.0 V, COUT = 4.7 mF tON 150 ms Power Supply Rejection Ratio (Adj devices) VIN to VOUT, f = 1 kHz, IOUT = 10 mA, VIN VOUT +0.5 V, VOUT(NOM) = 1.0 V, COUT = 4.7 mF PSRR(VIN) 75 dB VBIAS to VOUT, f = 1 kHz, IOUT = 10 mA, VIN VOUT +0.5 V, VOUT(NOM) = 1.0 V, VBIAS = 3.0 V, COUT = 4.7 mF PSRR(VBIAS) 85 dB Output Noise Voltage (Adj devices) VIN = VOUT +0.5 V, f = 10 Hz to 100 kHz, VOUT(NOM) = 1.0 V, COUT = 4.7 mF VN 35 x VOUT/VREF mVRMS Thermal Shutdown Threshold Temperature increasing 160 C Temperature decreasing 140 mA 4. Performance guaranteed over the indicated operating temperature range by design and/or characterization. Production tested at TA = 25C. Low duty cycle pulse techniques are used during the testing to maintain the junction temperature as close to ambient as possible. 5. Adjustable devices tested at VOUT = VREF unless otherwise noted; external resistor tolerance is not taken into account. 6. Dropout voltage is characterized when VOUT falls 3% below VOUT(NOM). 7. For adjustable devices, VIN dropout voltage tested at VOUT(NOM) = 2 x VREF. 8. For adjustable devices, VBIAS dropout voltage tested at VOUT(NOM) = 3 x VREF due to a minimum Bias operating voltage of 2.5 V. 9. For fixed output voltages below 1.5 V, VBIAS dropout does not apply due to a minimum Bias operating voltage of 2.5 V. www.onsemi.com 4 NCP137 ELECTRICAL CHARACTERISTICS -40C TJ 85C; VBIAS = 2.7 V or (VOUT + 1.6 V), whichever is greater, VIN = VOUT(NOM) + 0.3 V, IOUT = 1 mA, VEN = 1 V, CIN = 4.7 mF, COUT = 10 mF, CBIAS = 1 mF, unless otherwise noted. Typical values are at TJ = +25C. Min/Max values are for -40C TJ 85C unless otherwise noted. (Notes 4, 5) Parameter Test Conditions Symbol Output Discharge Pull-Down VEN 0.4 V, VOUT = 0.5 V, NCP137A options only Power Supply Rejection Ratio (Fixed Voltage devices) Output Noise Voltage (Fixed Voltage devices) Min Typ Max Unit RDISCH 150 W VIN to VOUT, f = 1 kHz, IOUT = 10 mA, VIN VOUT +0.5 V, VOUT(NOM) = 1.05 V, COUT = 10 mF PSRR(VIN) 75 dB VBIAS to VOUT, f = 1 kHz, IOUT = 10 mA, VIN VOUT +0.5 V, VOUT(NOM) = 1.05 V, VBIAS = 3.0 V, COUT = 10 mF PSRR(VBIAS) 85 dB VIN = VOUT +0.5 V, f = 10 Hz to 100 kHz, VOUT(NOM) = 1.05 V, COUT = 10 mF VN 40 mVRMS 4. Performance guaranteed over the indicated operating temperature range by design and/or characterization. Production tested at TA = 25C. Low duty cycle pulse techniques are used during the testing to maintain the junction temperature as close to ambient as possible. 5. Adjustable devices tested at VOUT = VREF unless otherwise noted; external resistor tolerance is not taken into account. 6. Dropout voltage is characterized when VOUT falls 3% below VOUT(NOM). 7. For adjustable devices, VIN dropout voltage tested at VOUT(NOM) = 2 x VREF. 8. For adjustable devices, VBIAS dropout voltage tested at VOUT(NOM) = 3 x VREF due to a minimum Bias operating voltage of 2.5 V. 9. For fixed output voltages below 1.5 V, VBIAS dropout does not apply due to a minimum Bias operating voltage of 2.5 V. Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions. www.onsemi.com 5 NCP137 APPLICATIONS INFORMATION VBAT NCP137 EN Switch-mode DC/DC VOUT = 1.5 V 1.5 V LX IN EN Processor OUT BIAS IN 1.0 V SNS LOAD GND FB GND I/O I/O To other circuits Figure 4. Typical Application: Low-Voltage DC/DC Post-Regulator with ON/OFF Functionality Dropout Voltage The NCP137 dual-rail very low dropout voltage regulator is using NMOS pass transistor for output voltage regulation from VIN voltage. All the low current internal control circuitry is powered from the VBIAS voltage. The use of an NMOS pass transistor offers several advantages in applications. Unlike PMOS topology devices, the output capacitor has reduced impact on loop stability. Vin to Vout operating voltage difference can be very low compared with standard PMOS regulators in very low Vin applications. The NCP137 offers smooth monotonic start-up. The controlled voltage rising limits the inrush current. The Enable (EN) input is equipped with internal hysteresis. NCP137 Voltage linear regulator Fixed and Adjustable version is available. Because of two power supply inputs VIN and VBIAS and one VOUT regulator output, there are two Dropout voltages specified. The first, the VIN Dropout voltage is the voltage difference (VIN - VOUT) when VOUT starts to decrease by percent specified in the Electrical Characteristics table. VBIAS is high enough; specific value is published in the Electrical Characteristics table. The second, VBIAS dropout voltage is the voltage difference (VBIAS - VOUT) when VIN and VBIAS pins are joined together and VOUT starts to decrease. Input and Output Capacitors The Adjustable device is designed to be stable for ceramic output capacitors with Effective capacitance in the range from 4.7 mF to 22 mF. The device is also stable with multiple capacitors in parallel, having the total effective capacitance in the specified range. For ADJ applications with nominal output voltage less than 0.6 V and for all the fixed voltage devices applications the output capacitor effective capacitance 10 mF to 22 mF is recommended. In applications where no low input supplies impedance available (PCB inductance in VIN and/or VBIAS inputs as example), the recommended CIN = 1 mF and CBIAS = 0.1 mF or greater. Ceramic capacitors are recommended. For the best performance all the capacitors should be connected to the NCP137 respective pins directly in the device PCB copper layer, not through vias having not negligible impedance. When using small ceramic capacitor, their capacitance is not constant but varies with applied DC biasing voltage, temperature and tolerance. The effective capacitance can be much lower than their nominal capacitance value, most importantly in negative temperatures and higher LDO output voltages. That is why the recommended Output capacitor capacitance value is specified as Effective value in the specific application conditions. Output Voltage Adjust The required output voltage of Adjustable devices can be adjusted from 0.5 V to 3.0 V using two external resistors. Typical application schematics is shown in Figure 5. V BIAS CBIAS NCP137 ADJ OUT BIAS V IN IN CIN V OUT R1 FB EN GND V EN V OUT + 0.5 V 4.7 mF R2 1 ) R1R2 Figure 5. Typical Application Schematics It is recommended to keep the total serial resistance of resistors (R1 + R2) no greater than 100 kW. www.onsemi.com 6 NCP137 Enable Operation Thermal Protection The enable pin will turn the regulator on or off. The threshold limits are covered in the electrical characteristics table in this data sheet. If the enable function is not to be used then the pin should be connected to VIN or VBIAS. Internal thermal shutdown (TSD) circuitry is provided to protect the integrated circuit in the event that the maximum junction temperature is exceeded. When TSD activated , the regulator output turns off. When cooling down under the low temperature threshold, device output is activated again. This TSD feature is provided to prevent failures from accidental overheating. Activation of the thermal protection circuit indicates excessive power dissipation or inadequate heatsinking. For reliable operation, junction temperature should be limited to +105C maximum. Current Limitation The internal Current Limitation circuitry allows the device to supply the full nominal current and surges but protects the device against Current Overload or Short. ORDERING INFORMATION Nominal Output Voltage Marking Option NCP137AFCTADJT2G ADJ A7 Output Active Discharge NCP137AFCTCADJT2G ADJ A7 Output Active Discharge, Back Side Coating NCP137BFCTADJT2G ADJ D7 Non-Active Discharge NCP137AFCT045T2G 0.45 V AT Output Active Discharge NCP137AFCT105T2G 1.05 V AA Output Active Discharge NCP137AFCT110T2G 1.10 V AH Output Active Discharge NCP137AFCTC110T2G 1.10 V AH Output Active Discharge, Back Side Coating NCP137AFCT120T2G 1.20 V AD Output Active Discharge Device Package Shipping WLCSP6 (Pb-Free) 5000 / Tape & Reel For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. To order other package and voltage variants, please contact your ON Semiconductor sales representative www.onsemi.com 7 NCP137 PACKAGE DIMENSIONS WLCSP6, 1.20x0.80 CASE 567MV ISSUE B EE EE E PIN A1 REFERENCE 2X A B NOTES: 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994. 2. CONTROLLING DIMENSION: MILLIMETERS. 3. COPLANARITY APPLIES TO SPHERICAL CROWNS OF SOLDER BALLS. D 0.05 C 2X DIM A A1 A2 b D E e 0.05 C TOP VIEW A2 0.05 C 0.05 C A1 NOTE 3 6X 0.03 C RECOMMENDED SOLDERING FOOTPRINT* SIDE VIEW b 0.05 C A B A MILLIMETERS MIN MAX --- 0.33 0.04 0.08 0.23 REF 0.24 0.30 1.20 BSC 0.80 BSC 0.40 BSC C SEATING PLANE A1 PACKAGE OUTLINE e e C 0.40 PITCH 0.40 PITCH B A 1 2 BOTTOM VIEW 6X 0.20 DIMENSIONS: MILLIMETERS *For additional information on our Pb-Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. 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