Micropower 150 mA LDO Linear Regulator

NCV4279B 5.0 V Micropower 150 mA LDO Linear Regulator with DELAY, Adjustable RESET, and Monitor FLAG The NCV4279B is a 5.0 V precision micropower voltage regulator. The output current capability is 150 mA. The output voltage is accurate within ±2.0% with a maximum dropout voltage of 0.6 V at 150 mA. Low quiescent current is a feature drawing only 90 mA with a 100 mA load. This part is ideal for any and all battery operated microprocessor equipment. Microprocessor control logic includes an active RESET (with DELAY), and a FLAG monitor which can be used to provide an early warning signal to the microprocessor of a potential impending RESET signal. The use of the FLAG monitor allows the microprocessor to finish any signal processing before the RESET shuts the microprocessor down. The active RESET circuit operates correctly at an output voltage as low as 1.0 V. The RESET function is activated during the power up sequence or during normal operation if the output voltage drops outside the regulation limits. The reset threshold voltage can be decreased by the connection of external resistor divider to RADJ lead. www.DataSheet4U.com The regulator is protected against reverse battery, short circuit, and thermal overload conditions. The device can withstand load dump transients making it suitable for use in automotive environments. The device has also been optimized for EMC conditions. Features • 5.0 V ± 2.0% Output • Low 90 mA Quiescent Current • Active RESET • Adjustable Reset • 150 mA Output Current Capability • Fault Protection − +60 V Peak Transient Voltage − −15 V Reverse Voltage − Short Circuit − Thermal Overload • Early Warning through FLAG/MON Leads • Internally Fused Leads in SO−14 and SO−20L Packages • NCV Prefix for Automotive and Other Applications Requiring Site and Control Changes http://onsemi.com MARKING DIAGRAMS 8 8 1 SO−8 D SUFFIX CASE 751 14 14 1 SO−14 D SUFFIX CASE 751A 1 20 20 1 SO−20L DW SUFFIX CASE 751D A WL, L YY, Y WW, W 1 NCV4279B AWLYYWW 1 NCV4279B AWLYWW 4279B ALYW 1 = Assembly Location = Wafer Lot = Year = Work Week 8 PIN CONNECTIONS SO−8 VIN MON RADJ DELAY SO−14 1 RADJ DELAY GND GND GND NC RESET 1 RADJ DELAY NC GND GND GND GND NC NC RESET 14 MON VIN GND GND GND VOUT FLAG 20 MON VIN NC GND GND GND GND NC VOUT FLAG VOUT FLAG RESET GND SO−20L ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 10 of this data sheet. © Semiconductor Components Industries, LLC, 2003 1 August, 2003 − Rev. 1 Publication Order Number: NCV4279B/D NCV4279B VBAT 10 µF VIN VOUT 10 µF RADJ VDD NCV4279B Delay CDELAY MON RFLG 10 k RRST 10 k FLAG GND RESET I/O I/O Figure 1. Application Diagram MAXIMUM RATINGS*{ Rating VIN (DC) Peak Transient Voltage (46 V Load Dump @ VIN = 14 V) Operating Voltage VOUT (DC) Voltage Range (RESET, FLAG) Input Voltage Range (MON) ESD Susceptibility (Human Body Model) Junction Temperature, TJ Storage Temperature, TS Package Thermal Resistance, SO−8: Junction−to−Case, RθJC Junction−to−Ambient, RθJA Package Thermal Resistance, SO−14 (Fused) Minimum Pad Data: Junction−to−Case, RθJC Junction−to−Ambient, RθJA Junction−to−Pin, RθJP (Note 3) Package Thermal Resistance, SO−20L (Fused) Minimum Pad Data: Junction−to−Case, RθJC Junction−to−Ambient, RθJA Junction−to−Pin, RθJP (Note 4) Lead Temperature Soldering: Reflow: (SMD styles only) (Notes 1, 2) Value −15 to 45 60 45 16 −0.3 to 10 −0.3 to 10 2.0 −40 to +150 −55 to 150 45 165 °C/W 15 110 33 °C/W 12 82 26 240 peak °C Unit V V V V V V kV °C °C °C/W 1. 60 second maximum above 183°C. 2. −5°C/+0°C allowable conditions. 3. Measured to pin 9. 4. Measured to pin 12. *The maximum package power dissipation must be observed. †During the voltage range which exceeds the maximum tested voltage of VIN, operation is assured, but not specified. Wider limits may apply. Thermal dissipation must be observed closely. http://onsemi.com 2 Microprocessor NCV4279B ELECTRICAL CHARACTERISTICS (IOUT = 1.0 mA, −40°C ≤ TJ ≤ 125°C; 6.0 V < VIN < 26 V; unless otherwise specified.) Characteristic Output Stage Output Voltage Dropout Voltage (VIN − VOUT) Load Regulation Line Regulation Quiescent Current, (IQ) Active Mode 9.0 V < VIN < 16 V, 100 mA ≤ IOUT ≤ 150 mA 6.0 V < VIN < 26 V, 100 mA ≤ IOUT ≤ 150 mA IOUT = 150 mA IOUT = 100 mA VIN = 14 V, 5.0 mA ≤ IOUT ≤ 150 mA [VOUT(typ) + 1.0] < VIN < 26 V, IOUT = 1.0 mA IOUT = 100 mA, VIN = 12 V, Delay = 3.0 V, MON = 3.0 V IOUT = 75 mA, VIN = 14 V, Delay = 3.0 V, MON = 3.0 V IOUT ≤ 150 mA, VIN = 14 V, Delay = 3.0 V, MON = 3.0 V − VOUT = 0 V (Guaranteed by Design) 4.90 4.85 − − -30 − − − − 151 40 150 5.0 5.0 400 100 5.0 15 90 4.0 12 300 190 180 5.10 5.15 600 150 30 60 125 6.0 19 − − − V V mV mV mV mV mA mA mA mA mA °C Test Conditions Min Typ Max Unit Current Limit Short Circuit Output Current Thermal Shutdown Reset Function (RESET) RESET Threshold HIGH (VRH) LOW (VRL) Output Voltage Low (VRLO) Delay Switching Threshold (VDT) Reset Delay Low Voltage Delay Charge Current Delay Discharge Current Reset Adjust Switching Voltage (VR(ADJ)) FLAG/Monitor Monitor Threshold Hysteresis Input Current Output Saturation Voltage MON = 2.0 V VOUT Increasing VOUT Decreasing 4.55 4.50 4.70 4.60 0.98 × VOUT 0.97 × VOUT 0.4 2.2 0.1 3.5 − 1.39 V V 1.0 V ≤ VOUT ≤ VRL, RRESET = 10 k − VOUT < RESET Threshold Low(min) DELAY = 1.0 V, VOUT > VRH DELAY = 1.0 V, VOUT = 1.5 V − − 1.4 − 1.5 5.0 1.23 0.1 1.8 − 2.5 − 1.31 V V V mA mA V Increasing and Decreasing − 1.10 20 −0.5 − 1.20 50 0.1 0.1 1.31 100 0.5 0.4 V mV mA V MON = 0 V, IFLAG = 1.0 mA http://onsemi.com 3 NCV4279B PACKAGE PIN DESCRIPTION Package Pin Number SO−8 3 4 5 − 6 7 8 1 2 SO−14 1 2 3−5, 10−12 6 7 8 9 13 14 SO−20L 1 2 4−7, 14−17 3, 8, 9, 13, 18 10 11 12 19 20 Pin Symbol RADJ DELAY GND NC RESET FLAG VOUT VIN MON Function Reset Adjust. If not needed connect to ground. Timing capacitor for RESET function. Ground. All GND leads must be connected to Ground. No connection. Active reset (accurate to VOUT ≥ 1.0 V) Open collector output from early warning comparator. ±2.0%, 150 mA output. Input Voltage. Monitor. Input for early warning comparator. If not needed connect to VOUT. TYPICAL PERFORMANCE CHARACTERISTICS 5.01 VOUT = 5.0 V VIN = 14 V IOUT = 5.0 mA 5.00 VOUT (V) IQ (mA) 1.2 VIN = 12 V 1.0 0.8 0.6 0.4 0.2 4.98 −40 −25 −10 0 +125°C +25°C −40°C 4.99 5 20 35 50 65 Temperature (°C) 80 95 110 125 0 5 10 15 IOUT (mA) 20 25 Figure 2. Output Voltage vs. Temperature Figure 3. Quiescent Current vs. Output Current 14 VIN = 12 V 12 10 IQ (mA) 8 6 −40°C 4 2 0 0 15 30 45 60 75 90 IOUT (mA) 105 120 135 140 7 T = 25°C 6 5 IQ (mA) 4 3 2 1 0 6 8 10 12 14 IOUT = 50 mA IOUT = 100 mA +125°C +25°C IOUT = 10 mA 16 18 VIN (V) 20 22 24 26 Figure 4. Quiescent Current vs. Output Current Figure 5. Quiescent Current vs. Input Voltage http://onsemi.com 4 NCV4279B TYPICAL PERFORMANCE CHARACTERISTICS 120 T = 25°C 100 80 IQ (µA) 60 49 20 0 Dropout Voltage (mV) IOUT = 100 mA 450 400 350 300 +125°C 250 200 150 100 50 6 8 10 12 14 16 18 VIN (V) 20 22 24 26 0 0 25 50 75 IOUT (mA) 100 125 150 +25°C −40°C Figure 6. Quiescent Current vs. Input Voltage Figure 7. Dropout Voltage vs. Output Current 1000 Unstable Region 1000 Unstable Region 100 CVout = 10 mF CVout = 0.1 mF 100 ESR (W) ESR (W) 10 Stable Region 0.1 10 1 Stable Region CVout = 10 mF 1 0 10 20 30 40 50 60 70 80 90 100110120130140150 OUTPUT CURRENT (mA) 0.01 0 10 20 30 40 50 60 70 80 90 100 110 OUTPUT CURRENT (mA) Figure 8. Output Capacitor ESR Figure 9. Output Stability with Output Capacitor Change http://onsemi.com 5 NCV4279B VOUT Current Source (Circuit Bias) IBIAS Current Limit Sense VIN RADJ VBG RESET + + − IBIAS + − Error Amplifier + − 1.8 V Thermal Protection VBG 3.0 µA Delay IBIAS Bandgap Reference VBG + VBG GND IBIAS FLAG MON − Figure 10. Block Diagram http://onsemi.com 6 NCV4279B CIRCUIT DESCRIPTION REGULATOR CONTROL FUNCTIONS The NCV4279B contains the microprocessor compatible control function RESET (Figure 11). DELAY Function VIN RESET Threshold DELAY Threshold (VDT) VOUT DELAY RESET Td Td Figure 11. Reset and Delay Circuit Wave Forms RESET Function The reset delay circuit provides a programmable (by external capacitor) delay on the RESET output lead. The DELAY lead provides source current (typically 2.5 mA) to the external DELAY capacitor during the following proceedings: 1. During Power Up (once the regulation threshold has been verified). 2. After a reset event has occurred and the device is back in regulation. The DELAY capacitor is discharged when the regulation (RESET threshold) has been violated. This is a latched incident. The capacitor will fully discharge and wait for the device to regulate before going through the delay time event again. FLAG/Monitor Function A RESET signal (low voltage) is generated as the IC powers up until VOUT is within 6.0% of the regulated output voltage, or when VOUT drops out of regulation,and is lower than 8.0% below the regulated output voltage. Hysteresis is included in the function to minimize oscillations. The RESET output is an open collector NPN transistor, controlled by a low voltage detection circuit. The circuit is functionally independent of the rest of the IC thereby guaranteeing that the RESET signal is valid for VOUT as low as 1.0 V. Adjustable Reset Function An on−chip comparator is provided to perform an early warning to the microprocessor of a possible reset signal. The reset signal typically turns the microprocessor off instantaneously. This can cause unpredictable results with the microprocessor. The signal received from the FLAG pin will allow the microprocessor time to complete its present task before shutting down. This function is p