® SPX2967 Advanced 400mA Low Dropout Voltage Regulator FEATURES ■ Output voltage tolerance ≤ 2% ■ 400mA current capability ■ Low Dropout Voltage ■ Very low standby current consumption ■ Input voltage up to 40V ■ Overvoltage protection up to 60V (≤ 400ms) ■ Reset function down to 1V output voltage ■ ESD protection up to 2000V ■ Adjustable reset time ■ On/Off logic ■ ■ ■ ■ Over temperature protection Reverse polarity protection Short-circuit protection Wide temperature range SPX2967 7 Pin TO-263 SPX2967 7 Pin TO-220 1 2 3 4 5 6 7 D E2 Q GND Q E6 RO GND D I E2 I 5 6 7 E2 RO 1 2 3 4 Now Available in Lead Free Packaging APPLICATIONS ■ Automotive ■ Industrial ■ Wireless Base Station DESCRIPTION Sipex’s SPX2967 is a 5 volt low dropout voltage regulator for automotive applications. It supplies output current at 400mA. The IC has short-circuit protection and has an overtemperature protection circuit. The part is available in 7 pin TO-220 and TO-263 packages. TYPICAL APPLICATION CIRCUIT Input + E2; eg from terminal 15 470nF Inhibit 5V Ouptut Q I SPX2967 RO 100nF SO RI Reset to µC GND 22µF Hold From µC 0.1µF RS2 Date: 8/23/04 SPX2967 400mA Low Dropout Voltage Regulator 1 © Copyright 2004 Sipex Corporation APPLICATIONS INFORMATION The IC regulates an input voltage VI in the range of 5.5 V < VI <40 V to a nominal output voltage of VQ= 5.0V. A reset signal is generated for an output voltage of VQ < VRT (typ. 4.5V). The reset delay can be set with an external capacitor. The device has two logic inputs. A voltage of VE2 >4.0V given to the E2-pin (e.g. by ignition) turns the device on. Depending on the voltage on pin E6 the IC may be hold in active-state even if VE2 goes down to low level. This makes it simple to implement a self-holding circuit without external components. When the device is turned off, the output voltage drops to 0V and current consumption tends towards 0 µA. DESIGN NOTES FOR EXTERNAL COMPONENTS The input capacitor CI is necessary for compensation of line influences. The resonant circuit consisting of lead inductance and input capacitance can be damped by a resistor of approximately 1Ω in series with CI . The output capacitor is necessary for the stability of the regulating circuit. Stability is guaranteed at values of ≥ 22µF and an ESR of less than 3Ω within the operating temperature range. CIRCUIT DESCRIPTION The control amplifier compares a reference voltage, which is kept highly accurate by resistance adjustment, to a voltage that is proportional to the output voltage and drives the base of the series transistor via a buffer. Saturation control as a function of the load current prevents and oversaturation of the power element. The reset output RO is in high state if the voltage on the delay capacitor CD greater than or equal to VUD. The delay capacitance CD is charged with the current ID for output voltages greater than the reset threshold VRT. If the output voltage gets lower than VRT a fast discharge of the delay capacitor CD sets in and as soon as VCD gets lower than VLD the reset output RO is set to low-level. The reset delay can be set within wide range by dimensioning the capacitance of the external capacitor. PIN DESCRIPTION PIN NUMBER PIN NAME DESCRIPTION 1 I 2 E2 Inhibit; Device is turned on by High signal on this pin; internal pulldown resistor of 100kΩ 3 RO Reset Output; The open-collector output is internally linked to Q via a 30k Ω resistor. Keep it open if not needed. 4 GND 5 D Reset Delay; connect via capacitor to GND for setting delay 6 E6 Hold; see truth table for function; this input is connected to output voltage via a pull up resistor of 50kΩ 7 Q 5V Output; block to GND with 22µF capacitor, ESR < 3Ω Date: 8/23/04 Input; Block to GND directly at the IC with a ceramic capacitor. Ground; connected to rear of chip SPX2967 400mA Low Dropout Voltage Regulator 2 © Copyright 2004 Sipex Corporation TRUTH TABLE FOR TURN-ON/TURN -OFF LOGIC Pin 2, Inhibit Pin 6, Hold VQ Comments L X OFF Initial state, Inhibit internally pulled up H X ON Regulator switched on via Inhibit, by ignition for example H L ON Hold clamped active to ground by controller while Inhibit is still high. X L ON Previous state remains, even ignition is shut off: self-holding state L L ON Ignition shut off while regulator is in self-holding state L H OFF Regulator shut down by releasing of Hold while Inhibit remains Low, final state. No active clamping required by external selfholding circuit (µC) to keep regulator in off-state Pin 2, Inhibit: E2 Enable function, active High Pin 6, Hold: E6 Hold and release function, active Low ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. Limit Values Parameter Symbol Unit min. max. Notes Input Voltage VI -42 42 V - Voltage VI - 60 V T≤ 400ms Current II - - - Internally Limited Voltage VRO -0.3 7 V` Current IRO - - - Internally Limited Voltage VD -0.3 42 V - Current VD - - - - Voltage VQ -0.3 7 V - Current IQ - - - Internally Limited Voltage VE2 -42 42 V - Current IE2 -5 5 mA Reset Output - Reset Delay Output Inhibit Date: 8/23/04 SPX2967 400mA Low Dropout Voltage Regulator 3 t≤ 400ms © Copyright 2004 Sipex Corporation ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. Parameter Symbol Limit Values Unit Notes Hold Voltage VE6 -0.3 7 V - Current IE6 - - mA IGND -0.5 - A - Junction Temperature TJ -40 150 ºC - Storage Temperature Tstg -50 150 ºC - VI 5.5 40 V - Junction Ambient Rthja - 65 K/W 7 Pin TO220 package Junction-case Rthjc - 6 K/W 7 Pin TO220 package Junction-case Zthjc - 2 K/W 7 Pin TO220 package Junction Ambient Rthja - 70 K/W 7 Pin TO263 package Junction-case Rthjc - 6 K/W 7 Pin TO263 package Junction-case Zthjc - 2 K/W 7 Pin TO263 package Internally Limited GND Current Temperatures Operating Range Input Voltage Thermal Resistance Date: 8/23/04 SPX2967 400mA Low Dropout Voltage Regulator 4 © Copyright 2004 Sipex Corporation ELECTRICAL CHARACTERISTICS VIN = 13.5V; -40°C < TJ < 125°C. The ♦ denotes the specifications which apply over the full operating temperature range, unless otherwise specified. Parameter Sym Min Typ Ma x Units Output Volatage VQ 4.9 5.0 5.1 V 5mA ≤ IQ ≤ 400mA 6V ≤ VI ≤ 26V Output Volatage VQ 4.9 5.0 5.1 V 5mA ≤ IQ ≤ 150mA 6V ≤ VI ≤ 40V Output Current Limiting IQ 500 - - mA Tj = 25° C Current Consumption Iq= II- IQ Iq - - 50 µA IC turned off Current Consumption Iq= II- IQ Iq - 1.0 10 µA Tj = 25° C IC turned off Current Consumption Iq= II- IQ Iq - 1.3 4 mA IQ =5mA IC turned on Current Consumption Iq= II- IQ Iq - - 60 mA IQ = 400mA Current Consumption Iq= II- IQ Iq - - 80 mA IQ = 400mA Vr = 5V VDR - 0.3 0.6 V Load Regulation ∆ VQ - - 50 mV Supply-voltage regulation ∆ VQ - 15 25 mV VI = 6 to 36V IQ = 5mA Supply-voltage rejection ∆ VQ - 54 - dB fr = 100Hz Vr = 0.5V Longterm stability ∆ VQ - 0 - mV 1000 h Drop Voltage Conditions IQ = 400mA (note 1) 5mA ≤ IQ ≤ 400mA Note 1: Drop voltage = VI - VQ measured when the output voltage has dropped 100mV from the nominal value obtained at 13.5V input. Date: 8/23/04 SPX2967 400mA Low Dropout Voltage Regulator 5 © Copyright 2004 Sipex Corporation ELECTRICAL CHARACTERISTICS VIN = 13.5V; -40°C < TJ < 125°C. The ♦ denotes the specifications which apply over the full operating temperature range, unless otherwise specified. Parameter Sym Min Typ Ma x Units Conditions VRT 4.2 4.5 4.8 V - - 4.5 - - V Rext = ∞ VRO, SAT - 0.1 0.4 V RR = 4.7kΩ (note 2) VRO - 30 - kΩ - VD, SAT - 50 100 mV VQ <VRT ID 8 15 25 µΑ VD = 1.5 V VUD 2.6 3 3.3 V tD - 20 - ms Lower delay switching threshold VLD - 0.43 - V - Reset reaction time tRR - 2 - µS C = 100nF Turn on voltage VU, INH - 3 4 V IC turned on Turn off voltage VL, INH 2 - - V IC turned off RINH 50 100 200 kΩ - ∆ VINH 0.2 0.5 0.8 V - Input Current IINH - 35 100 µΑ VINH= 4V Hold Voltage VU, HOLD 30 35 40 % Referred to VQ Turn off Voltage VL, HOLD 60 70 80 % Referred to VQ Pull up Resistor RHOLD 20 50 100 kΩ - VL, OV 42 44 46 V - ∆ VL, OV 2 - 6 V - Reset Generator Switching Threshold Reset High Level Saturation Voltage Internal Pull up resistor Saturation Voltage Charge Current Upper delay switching threshold Delay Time - Cd = 100nF Inhibit Pull down Resistor Hysteresis Overvoltage Protection Turn off Voltage Turn on Hysteresis Note 2: The reset output is low for 1V < VQ < VRT Date: 8/23/04 SPX2967 400mA Low Dropout Voltage Regulator 6 © Copyright 2004 Sipex Corporation TEST CIRCUIT II Q I 1000µF 470nF 22µF SPX2967 VI Inhibit VE2 RO D ID GND IQ VQ 4.7 kΩ IRO HOLD VR IGND VC BLOCK DIAGRAM Temperature Sensor Input Saturation Control Protection Circuit I Q D Control Amplifier Adjustment Buffer Reset Generator Bandgap Reference RO 5V Output Reset Delay Reset Output Turn-On/Turn-OFF Logic E2 Inhibit Date: 8/23/04 E6 Hold GND Ground SPX2967 400mA Low Dropout Voltage Regulator 7 © Copyright 2004 Sipex Corporation TIME RESPONSE VI t VINH VU,INH VL,INH t VQ <t RR VRT t I dV = D C dt D VD tRR VUD VLD VD, SAT t VRO tD V RO,SAT t Power on Reset Date: 8/23/04 Thermal Shutdown Voltage Drop Undervoltage Secondary Lead Bounce at Input Spike at Output SPX2967 400mA Low Dropout Voltage Regulator 8 Shutdown © Copyright 2004 Sipex Corporation ENABLE AND HOLD BEHAVIOR V I t VE2 VU,INH 1) 5) VL,INH t <10us VE6 VU, HOLD 2) 4) <10us 10) 6) 7) VL, HOLD t VQ VQ, NOM VRT 8) t VD VUD VLD VD, SAT V RO VRO, SAT t tD tRR 3) 9) t 1) Enable Device 2) Hold Inactive 3) Power-on reset 4) Hold active, clamped to GND by external uC 5) Enable inactive, clamped by int. pull down resistor. Date: 8/23/04 6) Pulse width smaller than 1us. 7) Hold inactive, released by uC. 8) Voltage controller shutdown. 9) Output-low reset 10) No switch via VE6 possible after E6 was released to VE6 > VE6, REL for more than 4 us. SPX2967 400mA Low Dropout Voltage Regulator 9 © Copyright 2004 Sipex Corporation PACKAGE: 7 PIN TO-220 0.405+/-0.010 [10.29+/-0.25] 0.400+/-0.10 [10.16+/-0.25] 3º TYP SEATING PLANE 0.18 +/- 0.01 [4.57 +/-0.25] 0.050 [1.27] 0.108+/-0.10 [2.64+/-0.25] 0.049 [1.24] 7º 0.050 [1.27] TYP 0.026 [0.66] TYP 0.3 [7.62] REF Date: 8/23/04 SPX2967 400mA Low Dropout Voltage Regulator 10 0.972+/-0.03 [24.69+/-0.76] 0.034+/-0.005 [8.64+/-0.25] 0.854+/-0.03 [21.69+/-0.76] 0.25+/-0.01 [6.35+/-0.25] 0.105 [2.67] TYP 0.177+/-0.02 [4.50+/-0.51] TYP © Copyright 2004 Sipex Corporation PACKAGE: 7 PIN TO-263 SEATING PLANE A (DATUM A) C2 H E c 1 2 3 4 5 6 7 L2 (E) E L1 D1 5X b 4X e 7 PIN TO-263 JEDEC TO-263 (BB) Variation E1 Dimensions in (mm) MIN NOM MAX A .160 - .190 A1 0 - .010 b .020 - .039 c .015 - .029 c2 .045 - .023 D1 .270 - E .380 - .420 E1 .245 - - e - L3 .575 - .625 L .070 - .110 L1 - - .066 L2 - - .070 L (b) WITH PLATING .067 BSC H L3 0º-8º c BASE METAL .010 BSC CONTACT AREA 7 PIN TO-263 Date: 8/23/04 SPX2967 400mA Low Dropout Voltage Regulator 11 © Copyright 2004 Sipex Corporation ORDERING INFORMATION Part number Output Voltage Package Type SPX2967U ......................... 5.0V ............................................................. 7 Pin TO-220 SPX2967T .......................... 5.0V ............................................................. 7 Pin TO-263 Available in lead free packaging. To order add “-L” suffix to part number. Example: SPX2967U = standard; SPX2967U-L = lead free Corporation ANALOG EXCELLENCE Sipex Corporation Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. Date: 8/23/04 SPX2967 400mA Low Dropout Voltage Regulator 12 © Copyright 2004 Sipex Corporation