CAT6202 500 mA / 13 V Adjustable CMOS LDO Regulator Description The CAT6202 is a 13 V rated 500 mA CMOS low dropout regulator that provides fast response time to load current and line voltage changes in an automotive environment. CAT6202 features a low RON P−channel pass element with internal control circuitry which prevents reverse current flow should the voltage at VOUT exceed VIN as in the case of the car’s battery voltage accidentally being applied to VOUT. Thermal protection and current limiting circuitry combine to protect the pass device against faults and abuse. Current limiting is user controlled through a single resistor to ground. A fault output (FLT) provides an alert should an over−current event or thermal shutdown occur. CAT6202 comes on−line gracefully even though it may be driving heavy capacitive loads thanks to built−in soft−start circuitry. Its output is protected against accidental connection to voltages greater than VIN and will not conduct current backwards into its supply. CAT6202 is available in 8−pad 2 mm x 3 mm TDFN package. http://onsemi.com TDFN−8 VP2 SUFFIX CASE 511AK PIN CONNECTIONS VIN VADJ EN ILIM BYP GND TDFN−8 (Top View) Features • • • • • • • • • • • • • • • Guaranteed 500 mA Continuous Output Current Low Dropout Voltage of 250 mV Typical at 500 mA Input Voltage Range: 3.3 V to 13.5 V User Adjustable Output Voltage User Programmable Current Limit Fault Output to Indicate Under−voltage, Current Limiting or Thermal Shutdown has Occurred Fault Blanking: 3 ms VOUT Withstands Battery Fault Voltages of up to 14 V Soft−Start Prevents Current Surges Stable with Ceramic Output Capacitor ±1.0% Output Voltage Initial Accuracy ±2.0% Accuracy Over Temperature Thermal Protection 8 Pad TDFN Package These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant © Semiconductor Components Industries, LLC, 2014 January, 2014 − Rev. 1 VOUT 1 FLT 1 MARKING DIAGRAMS HXC LAA YM G HXC L AA Y M G = CAT6202VP2−GT3 = Assembly Location = Last Two Digits of = Assembly Lot Number = Production Year (Last Digit) = Production Month (1−9, O, N, D) = Pb−Free Microdot ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 10 of this data sheet. Publication Order Number: CAT6202/D CAT6202 VIN VIN VOUT VOUT ILIM 1 mF 2.2 mF 47 kW CAT6202 VADJ BYP GND 10 nF Figure 1. CAT6202 Typical Application FLT Bias Control Current Sensing VIN VOUT Power PMOS CIN Over Current REXT 1.25 V Ref − EN BYP CBYP + − + Enable & Soft Start Error Amplifier GND Figure 2. CAT6202 Functional Block Diagram http://onsemi.com 2 COUT ILIM R1 VADJ R2 CAT6202 Table 1. PIN FUNCTION DESCRIPTION Pin No. Pin Name Description 1 VIN Supply voltage input 2 FLT Fault indicator (active low) 3 EN Enable input (active high) 4 BYP A capacitor between BYP and GND controls the regulator’s turn−on speed and improves PSRR 5 GND Ground reference 6 ILIM Current limit control pin 7 VADJ Output voltage adjustment 8 VOUT LDO Output Voltage Table 2. ABSOLUTE MAXIMUM RATINGS Rating VIN, VOUT Value Unit 0 to 16 V −0.3 to +6.0 V +150 _C Internally Limited (Note 1) mW −65 to +150 _C Lead Temperature (soldering, 5 sec.) 260 _C ESD Rating (Human Body Model) 1000 V ESD Rating (Machine Model) 350 V All other pins Junction Temperature, TJ Power Dissipation, PD Storage Temperature Range, TS 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. The maximum allowable power dissipation at any TA (ambient temperature) is PDmax = (TJmax – TA) / θJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. Table 3. RECOMMENDED OPERATING CONDITIONS (Note 2) Range Unit 3.3 to 13.5 V 0 to 6.0 V −40 to +125 _C Package Thermal Resistance (SOIC), θJA 235 _C/W Package Thermal Resistance (TDFN), θJA 92 _C/W Parameter VIN, VOUT All other pins Junction Temperature Range, TJ Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended Operating Ranges limits may affect device reliability. 2. The device is not guaranteed to work outside its operating rating. http://onsemi.com 3 CAT6202 Pin Function VIN is the supply pin for both the LDO’s operation and the load the LDO is driving. It is recommended that a 1 mF ceramic bypass capacitor be placed between the VIN pin and ground in close proximity to the device. When using longer connections to the power supply, CIN value can be increased without limit. The operating input voltage range is from 3.3 V to 13 V. FLT is an active low open−drain output indicating one of 3 fault conditions: 1. Input under−voltage: VIN is below the intended output voltage 2. Over−current. Brief over−current events are masked by a 3 ms time delay. CAT6202 will limit current anytime the load tries to draw more than the maximum allowed however reporting of this event will occur only if the event lasts longer than the delay timer. Events terminating before the timer reaches its full count are ignored and the timer is reset. 3. Over−temperature shutdown has occurred. EN is an active HIGH logic level input for switching the regulator’s output between ON and OFF. A weak internal pull down assures that if EN pin is left open, the circuit is disabled. BYP controls the soft−start feature for the regulator. When large capacitive loads are present at the regulator’s output, enabling the regulator will produce large current surges on the VIN supply line. To reduce these surges the regulator can be turned on gently by connecting a capacitor between the BYP pin and ground. The larger the capacitance value the more slowly VOUT approaches its programmed value. The table below gives a list of common capacitor values and their resulting turn−on times. If the soft−start feature is not desired, this pin should be left floating. Capacitance [nF] tON [ms] 0 0.2 10 1 100 10 is defined as the current at which VOUT is still within 80% of its nominal value and should not be confused with ISC, the short circuit current, measured at VOUT = 0 V, which is typically 100 mA greater than ILIM. A resistor REXT placed between ILIM and GND selects the trip current according to a formula: I LIMIT + I LIMIT0 ) Current_Limit_Factor(CLF) R EXT (eq. 1) ILIM0 is the built−in minimum current limit (typically 150 mA), and CLF is a numerical value (typical 30,000 Volts) which relates the allowable load current to a resistance value. The value of this resistor is determined by the following equation: R EXT(W) + CLF(V) I LIM(A) * I LIM0(A) (eq. 2) It is recommended that ILIM be set with at least 50%, and preferably 60%, higher than the maximum intended continuous IOUT. Example: Set ILIMIT = 800 mA R EXT(W) + 30, 000 V + 47 KW 0.8 A * 0.15 A (eq. 3) VADJ is the output voltage control pin. A resistor divider placed between VOUT and GND whose center point connects to VADJ sets the LDO regulator’s output voltage. Typical VADJ value is 1.25 V. The current through the resistor divider can be anywhere between 10 mA and 1 mA. The higher this current is, the lower the noise. VOUT is the LDO regulator output. A small 2.2 mF ceramic bypass capacitor is required between VOUT and ground. For better transient response, its value can be increased to 4.7 mF. This capacitor should be located near the device. ǒ V OUT + V ADJ 1 ) Ǔ R1 R2 (eq. 4) VOUT is protected against short circuits and over−temp operation by internal circuitry. In the event of an over−current, the LDO behaves like a current source, limiting current at the output. The maximum current allowed is set by REXT, the resistor between ILIM and GND. If the load attempts to draw more than the allowed current, VOUT and IOUT decrease together and thus limit the total power delivered. VOUT is protected against the application of voltages greater than VIN. For example, in automotive applications, if CAT6202 is powering a remote load and damage occurs to a wiring harness shorting a powered line, Battery + for instance, to VOUT, CAT6202 will not be damaged by this higher voltage being applied to VOUT. GND is the ground reference for the LDO. The TDFN package center metal pad is internally connected to GND. If electrical contact is made with this pad, it should be to GND and/or the ground plane of the PCB. Connection to the ground plane enhances thermal conductivity drawing heat out of the package and into the surrounding PCB. ILIM stands for Current Limit and is the control input for setting the point at which the current limit is invoked. ILIM http://onsemi.com 4 CAT6202 Table 4. ELECTRICAL CHARACTERISTICS (VIN = VOUT + 1 V, VEN = High, IOUT = 1 mA, CIN = 1 mF, COUT = 2.2 mF, REXT = 47 kW, ambient temperature of 25°C (over recommended operating conditions unless specified otherwise). Bold numbers apply for the entire junction temperature range.) Symbol VIN Parameter Conditions Input Voltage Min Typ Max Unit V 3.3 13.5 VOUT Output Voltage VADJ 12.5 VADJ ADJ Voltage 1.238 IADJ ADJ Input Current TCOUT Output Voltage Temp. Coefficient VR−LINE Line Regulation 1.250 0.5 VDROP IGND IGND−SD PSRR V 2.0 mA 40 VOUT + 1.0 < VIN < 13 V −0.2 ±0.1 −0.4 VR−LOAD 1.262 ppm/°C +0.2 %/V +0.4 Load Regulation IOUT = 1 mA to 500 mA 1 2.5 % Dropout Voltage (Note 3) IOUT = 500 mA 250 350 mV Ground Current IOUT = 0 mA 100 150 mA IOUT = 500 mA 160 300 Shutdown Ground Current VEN < 0.4 V Power Supply Rejection Ratio f = 1 kHz, CBYP = 10 nF 2 mA dB 62 f = 20 kHz, CBYP = 10 nF 52 TON Turn−On Time CBYP = 10 nF 700 ISC Output short circuit current VOUT < 0.8 V 700 800 1000 mA ILIM Output current limit VOUT = 0.8 VOUT (1 mA) 600 650 800 mA CLF Current Limit Factor VOUT < 0.8 V 24 30 36 KV tFD Fault Delay 1.5 3 6 ms 500 mW VIN−UVLO ESR Under voltage lockout threshold ms 3.1 ROUT equivalent series resistance 5 V ENABLE INPUT VHI Logic High Level VIN = 3.3 to 13 V VLO Logic Low Level VIN = 3.3 to 13 V IEN Enable Input Current VEN = 0.4 V VEN = VIN V 2 0.4 V 0.15 1 mA 3 5 THERMAL PROTECTION TSD Thermal Shutdown 140 °C THYS Thermal Hysteresis 10 °C 3. Dropout voltage is defined as the input−to−output differential at which the output voltage drops 2% below its nominal value. During test, the input voltage stays always above the minimum 3.3 V. The given values are for VOUT = 7.5 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. http://onsemi.com 5 CAT6202 TYPICAL CHARACTERISTICS (shown for 7.5 V output) (VIN = 8.5 V, R1 = 5.1 kW, R2 = 1 kW, CIN = 1 mF, COUT = 2.2 mF, CBYP = 10 nF, REXT = 47 kW, FLT not connected, TA = 25°C unless otherwise specified.) 8 7.50 IOUT = 1 mA 6 IOUT = 500 mA OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 7 5 4 3 2 7.45 7.40 7.35 1 0 0 2 4 6 8 10 12 7.30 14 11 12 Figure 3. Dropout Characteristics Figure 4. Line Regulation 13 14 100 125 1.26 ADJUSTABLE VOLTAGE (V) OUTPUT VOLTAGE (V) 10 INPUT VOLTAGE (V) VIN = 8 V TEMP = 25°C 7.45 7.40 7.35 0 100 200 300 400 1.25 1.24 1.23 1.22 −25 500 0 25 50 75 OUTPUT LOAD CURRENT (mA) TEMPERATURE (°C) Figure 5. Load Regulation Figure 6. Adjustable Voltage vs. Temperature 175 GROUND CURRENT (mA) 175 GROUND CURRENT (mA) 9 INPUT VOLTAGE (V) 7.50 7.30 8 150 125 100 150 125 100 VIN = 8.5 V 75 0 100 200 300 400 75 −25 500 0 25 50 75 100 OUTPUT LOAD CURRENT (mA) TEMPERATURE (°C) Figure 7. Ground Current vs. Load Current Figure 8. Ground Current vs. Temperature http://onsemi.com 6 125 CAT6202 TYPICAL CHARACTERISTICS (shown for 7.5 V output) (VIN = 8.5 V, R1 = 5.1 kW, R2 = 1 kW, CIN = 1 mF, COUT = 2.2 mF, CBYP = 10 nF, REXT = 47 kW, FLT not connected, TA = 25°C unless otherwise specified.) 200 150 100 VOUT = 0 REXT = ∞ 50 0 2 4 6 8 10 12 150 125 100 75 50 25 0 14 10 1.50 1.25 1.00 0.75 8 10 12 2 4 6 8 10 12 6 4 2 0 14 4 5 6 7 8 9 10 INPUT VOLTAGE (V) INPUT VOLTAGE (V) Figure 11. Enable Threshold vs. Input Voltage Figure 12. Fault Bar Voltage vs. Input Voltage 2.50 7 2.25 6 5 4 3 VIN = 8 V TEMP = 25°C 2 1 100 200 300 400 500 600 700 800 900 2.00 1.75 1.50 1.25 1.00 0.75 VIN = VEN = 8 V 0.50 0.25 0 6 7 8 9 10 11 12 13 OUTPUT CURRENT (mA) OUTPUT VOLTAGE (V) Figure 13. Output Voltage vs. Load Current Figure 14. Output Current (Sink) vs. Output Voltage http://onsemi.com 7 14 8 8 0 6 Figure 10. Ground Current vs. Input Voltage 1.75 0 4 Figure 9. Output Short−circuit Current vs. Input Voltage 12 0 2 INPUT VOLTAGE (V) 2.00 0.50 0 INPUT VOLTAGE (V) FAULTBAR VOLTAGE (V) ENABLE THRESHOLD VOLTAGE (V) GROUND CURRENT (mA) 200 0 OUTPUT VOLTAGE (V) 175 250 OUTPUT CURRENT (SINK) (mA) SHORT−CIRCUIT CURRENT (mA) 300 14 CAT6202 TYPICAL CHARACTERISTICS (shown for 7.5 V output) (VIN = 8.5 V, R1 = 5.1 kW, R2 = 1 kW, CIN = 1 mF, COUT = 2.2 mF, CBYP = 10 nF, REXT = 47 kW, TA = 25°C unless otherwise specified. All transient characteristics are generated using the evaluation board CAT6202EVAL1.) Figure 15. Enable Turn−On (No Load) Figure 16. Enable Turn−On (15 W Load) Figure 17. Enable Operation (No Load) Figure 18. Enable Operation (15 W Load) Figure 19. Load Transient Response (1 mA to 500 mA) Figure 20. Fault Operation (VIN = 7 V and 15 W Load) http://onsemi.com 8 CAT6202 PACKAGE DIMENSIONS TDFN8, 2x3 CASE 511AK−01 ISSUE A D A e b E2 E PIN#1 IDENTIFICATION A1 PIN#1 INDEX AREA D2 TOP VIEW SIDE VIEW SYMBOL MIN NOM MAX A 0.70 0.75 0.80 A1 0.00 0.02 0.05 A2 0.45 0.55 0.65 A3 A2 A3 b 0.20 0.25 0.30 D 1.90 2.00 2.10 D2 1.30 1.40 1.50 E 2.90 3.00 3.10 E2 1.20 1.30 1.40 L BOTTOM VIEW 0.20 REF e FRONT VIEW 0.50 TYP 0.20 0.30 L 0.40 Notes: (1) All dimensions are in millimeters. (2) Complies with JEDEC MO-229. http://onsemi.com 9 CAT6202 Table 5. ORDERING INFORMATION Device Order Number CAT6202VP2−GT3 Specific Device Marking Package Type Lead Finish Shipping† HXC TDFN−8 NiPdAu Tape & Reel, 3,000 Units / 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. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). 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