ILC7080 IMPALA | Alldatasheet

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50/100mA SOT-23 CMOS RF LDO™ Regulators Impala Linear Corporation Impala Linear Corporation 1(408) 574-3939 www.impalalinear.com Sept. 1998 ILC7080/81 1.1 The ILC7080/81 are 50 or 100mA low dropout (LDO) volt- age regulators designed to provide a high performance solution to low power systems. The devices offer a typical combination of low dropout and low quiescent current expected of CMOS parts, while uniquely providing the low noise and high ripple rejection characteristics usually only associated with bipolar LDO regulators. The devices have been optimized to meet the needs of modern wireless communications design; Low noise, low dropout, small size, high peak current, high noise immuni- ty. The ILC7080/81 are designed to make use of low cost ceramic capacitors while outperforming other devices that require tantalum capacitors. General Description Features

  • Ultra low 1mV dropout per 1mA load
  • 1% output voltage accuracy
  • Uses low ESR ceramic output capacitor to minimize noise and output ripple
  • Only 100µA ground current at 100mA load
  • Ripple rejection up to 85dB at 1kHz, 60dB at 1MHz
  • Less than 80µV RMS noise at BW = 100Hz to 100kHz
  • Excellent line and load transient response
  • Over current / over temperature protection
  • Guaranteed up to 80/150mA output current
  • Industry standard five lead SOT-23 package output voltage options
  • Metal mask option available for custom voltages between 2.5 to 10V
  • Cellular phones
  • Wireless communicators
  • PDAs / palmtops / organizers
  • Battery powered portable electronics

Applications

Ordering Information (TA = -40°C to +85°C) ILC7080AIM5-xx 50mA, fixed voltage ILC7080AIM5-ADJ 50mA adjustable voltage ILC7081AIM5-xx 100mA, fixed voltage ILC7081AIM5-ADJ 100mA, adjustable voltage Note: Fixed voltage options are defined by 2-digit code as shown in the package markings information section of the datasheet.

50/100mA SOT-23 CMOS RF LDO™ Regulators Impala Linear Corporation 2(408) 574-3939 www.impalalinear.com Sept. 1998 ILC7080/81 1.1 Pin Description ILC7081/81-xx (fixed voltage version) Pin Number Pin Name Pin Description

1 VIN Connect direct to supply

2 GND Ground pin. Local ground for CNOISE and COUT. 3 ON/OFF By applying less than 0.4V to this pin the device will be turned off.

4 CNOISE Optional noise bypass capacitor may be connected between this

pin and GND (pin 2). Do not connect CNOISE directly to the main power ground plane. 5 VOUT Output Voltage. Connect COUT between this pin and GND (pin 2) Pin Description ILC7081/81-ADJ (adjustable voltage version) Pin Number Pin Name Pin Description 2 GND Ground pin. Local ground for CNOISE and COUT. 3 ON/OFF By applying less than 0.4V to this pin the device will be turned off. 4 VADJ Voltage feedback pin to set the adjustable output voltage. Do not connect a capacitor to this pin. 5 VOUT Output Voltage. Connect COUT between this pin and GND (pin 2) Pin Package Configurations ILC7080-xx ILC7081-xx SOT23-5 ON OFF CNOISE VIN VOUT GND 12 3 ILC7080-ADJ ILC7081-ADJ SOT23-5 ON OFF VADJ VIN VOUT GND 12 3

50/100mA SOT-23 CMOS RF LDO™ Regulators Impala Linear Corporation 3(408) 574-3939 www.impalalinear.com Sept. 1998 ILC7080/81 1.1 Parameter Symbol Ratings Units Input voltage On/Off Input voltage VIN VON/OFF -0.3 to +13.5 -0.3 to VIN V Output Current IOUT Short circuit protected mA Output voltage VOUT -0.3 to VIN+0.3 V Package Power Dissipation (SOT-23-5) PD 250 (Internally Limited) mW Maximum Junction Temp Range TJ(max) -40~+150 °C Storage Temperature TSTG -40~+125 °C Operating Ambient Temperature TA -40 to +85 °C Package Thermal Resistance θJA 333 °C/W Absolute Maximum Ratings (Note 1) Absolute Maximum Ratings (Note 1) Parameter Symbol Conditions Min Typ Max Units Input Voltage Range VIN 2 13 V Output voltage VOUT IOUT = 1mA 1mA < IOUT < 100mA 1mA < IOUT < 100mA -1.5 -3.5 VOUT(NOM) +1 1.5 +3.5 Feedback Voltage (ADJ version) VADJ 1.215 1.202 1.240 1.265 1.278 V Line Regulation ∆VOUT/ (VOUT*∆VIN) VOUT(NOM) + 1V < VIN < 12V 0.007 0.014 0.032 %/V IOUT = 0mA 0.1 1 IOUT = 10mA 10 25 IOUT = 50mA 50 75 100 IOUT = 100mA 100 150 200 Dropout voltage (Note 3) VIN – VOUT 7081 only IOUT = 150mA 150 225 300 mV Unless otherwise specified, all limits are at T A = 25°C; VIN = VOUT(NOM) + 1V, IOUT = 1mA, COUT = 1µF, VON/OFF = 2V. Boldface limits apply over the operating temperature range. (Note 2)

50/100mA SOT-23 CMOS RF LDO™ Regulators Impala Linear Corporation 4(408) 574-3939 www.impalalinear.com Sept. 1998 ILC7080/81 1.1 Parameter Symbol Conditions Min Typ Max Units IOUT = 0mA 95 200 220 IOUT = 10mA 100 220 240 IOUT = 50mA 100 220 240 IOUT = 100mA 100 240 260 Ground Pin Current IGND 7081 only IOUT = 150mA 115 260 280 µA Shutdown (OFF) Current ION/OFF VON/OFF = 0V 0.1 2 µA ON/OFF Input Voltage VON/OFF High = Regulator On Low = Regulator Off 2.0 13 0.6 V ON/OFF Pin Input Current (Note 5) IIN(ON/OFF) VON/OFF = 0.6V, regulator OFF VON/OFF = 2V, regulator ON 0.3 µA Peak Output Current (Note 4) IOUT(PEAK) VOUT > 0.95VOUT(NOM), tpw = 2ms 400 500 mA Output Noise Voltage eN BW = 300Hz to 50kHz, CNOISE = 0.01µF 80 µVRMS freq = 1kHz 85 freq = 10kHz 70 Ripple Rejection ∆VOUT/∆VIN COUT = 4.7µF, IOUT = 100mA freq = 1MHz 60 dB Dynamic Line Regulation ∆VOUT(line) VIN: VOUT(NOM) + 1V to VOUT(NOM) + 2V, tr/tf = 2µs; IOUT = 100mA 4 mV Dynamic Load Regulation ∆VOUT(load) IOUT: 0 to 100mA; d(IOUT)/dt = 100mA/µs with COUT = 0.47µF with COUT = 2.2µF mV Short Circuit Current ISC VOUT = 0V 600 mA Note 1: Absolute maximum ratings indicate limits which when exceeded may result in damage to the component. Electrical specific ations do not apply when operating the device outside of its rated operating conditions. Note 2: Specified Min/Max limits are production tested or guaranteed through correlation based on statistical control methods. Measurements are taken at constant junction temperature as close to ambient as possible using low duty pulse testing. Note 3: Dropout voltage is defined as the input to output differential voltage at which the output voltage drops 2% below the n ominal value measured with a 1V differential. Note 4: Guaranteed by design Note 5: The device’s shutdown pin includes a 2MW internal pull down resistor connected to ground. Unless otherwise specified, all limits are T A = 25°C; VIN = VOUT(NOM) + 1V, IOUT = 1mA, COUT = 1µF, VON/OFF = 2V. Boldface limits apply over the operating temperature range. (Note 2)

50/100mA SOT-23 CMOS RF LDO™ Regulators Impala Linear Corporation 5(408) 574-3939 www.impalalinear.com Sept. 1998 ILC7080/81 1.1 The ILC7080/81 LDO design is based on an advanced cir- cuit configuration for which patent protection has been applied. Typically it is very difficult to drive a capacitive out- put with an amplifier. The output capacitance produces a pole in the feedback path, which upsets the carefully tai- lored dominant pole of the internal amplifier. Traditionally the pole of the output capacitor has been “eliminated” by reducing the output impedance of the regulator such that the pole of the output capacitor is moved well beyond the gain bandwidth product of the regulator. In practice, this is difficult to do and still maintain high frequency operation. Typically the output impedance of the regulator is not sim- ply resistive, such that the reactive output impedance inter- acts with the reactive impedance of the load resistance and capacitance. In addition, it is necessary to place the domi- nant pole of the circuit at a sufficiently low frequency such that the gain of the regulator has fallen below unity before any of the complex interactions between the output and the load occur. The ILC7080/81 does not try to eliminate the output pole, but incorporates it into the stability scheme. The load and output capacitor forms a pole, which rolls off the gain of the regulator below unity. In order to do this the output impedance of the regulator must be high, looking like a current source. The output stage of the regulator becomes a transconductance amplifier, which converts a voltage to a current with a substantial output impedance. The circuit which drives the transconductance amplifier is the error amplifier, which compares the regulator output to the band gap reference and produces an error voltage as the input to the transconductance amplifier. The error ampli- fier has a dominant pole at low frequency and a “zero” which cancels out the effects of the pole. The zero allows the regulator to have gain out to the frequency where the output pole continues to reduce the gain to unity. The con- figuration of the poles and zero are shown in figure 1. Instead of powering the critical circuits from the unregulat- ed input voltage, the CMOS RF LDO powers the internal circuits such as the bandgap, the error amplifier and most of the transconductance amplifier from the boot strapped regulated output voltage of the regulator. This technique offers extremely high ripple rejection and excellent line tran- sient response. A block diagram of the regulator circuit used in the ILC7080/81 is shown in figure 2, which shows the input-to- output isolation and the cascaded sequence of amplifiers that implement the pole-zero scheme outlined above. The ILC7080/81 were designed in a CMOS process with some minor additions, which allow the circuit to be used at input voltages up to 13V. The resulting circuit exceeds the frequency response of traditional bipolar circuits. The ILC7080/81 is very tolerant of output load conditions with the inclusion of both short circuit and thermal overload pro- tection. The device has a very low dropout voltage, typical- ly a linear response of 1mV per milliamp of load current, and none of the quasi-saturation characteristics of a bipolar output device. All the good features of the frequency response and regulation are valid right to the point where the regulator goes out of regulation in a 4mV transition region. Because there is no base drive, the regulator is capable of providing high current surges while remaining in regulation. This is shown in the high peak current of 500mA which allows for the ILC7080/81 to be used in systems that require short burst mode operation. DOMINANT POLE OUTPUT POLE 85 dB COMPENSATING ZERO UNITY GAIN FREQUENCY GAIN Figure 1: ILC7080/81 RF LDO frequency response Operation

50/100mA SOT-23 CMOS RF LDO™ Regulators Impala Linear Corporation 6(408) 574-3939 www.impalalinear.com Sept. 1998 ILC7080/81 1.1 ON/OFF GND VOUT VIN CNOISE FEEDBACK BANDGAP REFERENCE VREF ERROR AMPLIFIER TRANS- CONDUCTANCE AMPLIFIER INTERNAL V DD Figure 2: ILC7080/81 RF LDO regulator block digram Shutdown (ON/OFF) Operation The ILC7080/81 output can be turned off by applying 0.4V or less to the device’s ON/OFF pin (pin 3). In shutdown mode, the ILC7080/81 draws less than 1mA quiescent cur- rent. The output of the ILC7081 is enabled by applying 2V to 13V at the ON/OFF pin. In applications where the ILC7080/81 output will always remain enabled, the ON/OFF pin may be connected to V IN (pin 1). The ILC7080/81’s shutdown circuitry includes hysteresis, as such the device will operate properly even if a slow moving signal is applied to the ON/OFF pin. The device’s shutdown pin includes a 2MΩ internal pull down resistor connected to ground. Short Circuit Protection The ILC7080/81 output can withstand momentary short cir- cuit to ground. Moreover, the regulator can deliver very high output peak current due to its 1A instantaneous short circuit current capability. Thermal Protection The ILC7080/81 also includes a thermal protection circuit which shuts down the regulator when die temperature exceeds 170°C due to overheating. In thermal shutdown, once the die temperature cools to below 160°C, the regula- tor is enabled. If the die temperature is excessive due to high package power dissipation, the regulator’s thermal cir- cuit will continue to pulse the regulator on and off. This is called thermal cycling. Excessively high die temperature may occur due to high dif- ferential voltage across the regulator or high load current or high ambient temperature or a combination of all three. Thermal protection protects the regulator from such fault conditions and is a necessary requirement in today’s designs. In normal operation, the die temperature should be limited to under 150°C. Adjustable Output Voltage Figure 3 shows how an adjustable output voltage can be easily achieved using ILC7080/81-ADJ. The output voltage, V OUT is given by the following equation: VOUT = 1.24V x (R1/R2 + 1) For best results, a resistor value of 470k Ω or less may be used for R2. The output voltage can be programmed from 2.5V to 12V. Note: An external capacitor should not be connected to the adjustable feedback pin (pin 4). Connecting an external capacitor to pin 4 may cause regulator instability and lead to oscillations. ILC7080-ADJ ILC7081-ADJ VOUT VIN COUT SOT23-5 CIN R1 R2 ON OFF 12 3

45 VADJ

Figure 3: Application circuit for adjustable output voltage

50/100mA SOT-23 CMOS RF LDO™ Regulators Impala Linear Corporation 10(408) 574-3939 www.impalalinear.com Sept. 1998 ILC7080/81 1.1 Recommended Ceramic Output Capacitors COUT Capacitor Size IOUT Dielectric Part Number Capacitor Vendor 1µF 0805 0 to 100mA X5R C2012X5R1A105KT TDK 1µF 0805 0 to 100mA X7R GRM40X7R105K010 muRata 1µF 0805 0 to 100mA X7R LMK212BJ105KG Talyo-Yuden 1µF 1206 0 to 100mA X7R GRM42-6X7R105K016 muRata 1µF 1206 0 to 100mA X7R EMK316BJ105KL Talyo-Yuden 1µF 1206 0 to 100mA X5R TMK316BJ105KL Talyo-Yuden 2.2µF 0805 0 to 150mA X5R GRM40X5R225K 6.3 muRata 2.2µF 0805 0 to 150mA X5R C2012X5R0J225KT TDK 2.2µF 1206 0 to 150mA X5R EMK316BJ225ML Talyo-Yuden 4.7µF 1206 0 to 150mA X5R GRM42-6X5R475K010 muRata 4.7µF 1206 0 to 150mA X7R LMK316BJ475ML Talyo-Yuden

50/100mA SOT-23 CMOS RF LDO™ Regulators Impala Linear Corporation 11(408) 574-3939 www.impalalinear.com Sept. 1998 ILC7080/81 1.1 Output Voltage vs Temperature 3.015 3.01 3.005 2.995 2.99 Output voltage (V) COU T = 1µF (C eram ic) VOUT = 3.0V 2.985 Temperature (°C) 0 50 100 150-50 Dropout Char acteristics VIN (V) 3.4 3.3 3.2 3.1 VOU T (V) COUT = 1µF (Ceramic) VOU T = 3.3V 3 3.2 3.4 3.6 IOUT = 0mA IOUT = 10mA IOUT = 50mA IOUT = 100mA IOUT = 150mA Unless otherwise specified TA T=25°C, VIN =VOUT(NOM), + 1V, ON/OFF pin tied to VIN Characterization at output currents above 50mA applies to ILC7081 TYPICAL PERFORMANCE CHARACTERISTICS Dropout Voltage vs Temperature Dropout voltage (mV) Temperature (°C) 250 200 150 100 –40 85 25 VOU T = 3.0V IOU T = 150mA IOU T = 100mA IOUT = 50mA IOUT = 0mA 150 125 100 2 4 6 8 10 12 14 Ground Current vs Input Voltage VOUT = 3.0 V COUT = 1µF (Ceramic) IOU T = 150mA IOUT = 100mA IOU T = 50mA IOUT = 10mA IOUT = 0mA VIN (V) IGN D (µA) 250 200 150 100 0 50 100 150 Dropout Voltage vs IOU T Dropout voltage (mV) Output Current (mA) TA = –40°C TA = 85°C TA = 25°C VOU T = 3.0V Line T ransient Response 5µs/div VIN (V)VOUT (V) 3.01 3.00 2.99 2.98 VIN: tr/t f < 1 µs VOU T = 3.0V COUT = 2.2 µF (Ceramic) IOU T = 100 mA 0.47µF (Ceramic) 7081 only 0.47µF (Ceramic) 0.47µF (Ceramic) Dropout Characteristics Line Transient Response

50/100mA SOT-23 CMOS RF LDO™ Regulators Impala Linear Corporation 12(408) 574-3939 www.impalalinear.com Sept. 1998 ILC7080/81 1.1 Unless otherwise specified TA T=25°C, VIN =VOUT(NOM), + 1V, ON/OFF pin tied to VIN Characterization at output currents above 50mA applies to ILC7081 TYPICAL PERFORMANCE CHARACTERISTICS 5µs/div

50/100mA SOT-23 CMOS RF LDO™ Regulators Impala Linear Corporation 13(408) 574-3939 www.impalalinear.com Sept. 1998 ILC7080/81 1.1 Unless otherwise specified TA T=25°C, VIN =VOUT(NOM), + 1V, ON/OFF pin tied to VIN Characterization at output currents above 50mA applies to ILC7081 TYPICAL PERFORMANCE CHARACTERISTICS

50/100mA SOT-23 CMOS RF LDO™ Regulators Impala Linear Corporation 14(408) 574-3939 www.impalalinear.com Sept. 1998 ILC7080/81 1.1 Unless otherwise specified TA T=25°C, VIN =VOUT(NOM), + 1V, ON/OFF pin tied to VIN Characterization at output currents above 50mA applies to ILC7081 TYPICAL PERFORMANCE CHARACTERISTICS

50/100mA SOT-23 CMOS RF LDO™ Regulators Impala Linear Corporation 15(408) 574-3939 www.impalalinear.com Sept. 1998 ILC7080/81 1.1 Output voltage (V) Grade Order Information *Package Marking Supplied as:

2.85 A ILC7080AIM5-285 CFXX 3k Units on Tape and Reel

3.0 A ILC7080AIM5-30 CAXX 3k Units on Tape and Reel

3.3 A ILC7080AIM5-33 CBXX 3k Units on Tape and Reel

3.6 A ILC7080AIM5-36 CDXX 3k Units on Tape and Reel

5.0 A ILC7080AIM5-50 CCXX 3k Units on Tape and Reel

ADJ A ILC7080AIM5-ADJ CEXX 3k Units on Tape and Reel *Note: First two characters identify the product and the last two characters identify the date code. Output voltage (V) Grade Order Information *Package Marking Supplied as:

2.85 A ILC7081AIM5-285 CVXX 3k Units on Tape and Reel

3.0 A ILC7081AIM5-30 CQXX 3k Units on Tape and Reel

3.3 A ILC7081AIM5-33 CRXX 3k Units on Tape and Reel

3.6 A ILC7081AIM5-36 CTXX 3k Units on Tape and Reel

4.7 A ILC7081AIM5-47 CWXX 3k Units on Tape and Reel

5.0 A ILC7081AIM5-50 CSXX 3k Units on Tape and Reel

ADJ A ILC7081AIM5-ADJ CUXX 3k Units on Tape and Reel *Note: First two characters identify the product and the last two characters identify the date code. ILC7080AIM5-xx ILC7081AIM5-xx

50/100mA SOT-23 CMOS RF LDO™ Regulators Impala Linear Corporation 16(408) 574-3939 www.impalalinear.com Sept. 1998 ILC7080/81 1.1 Devices sold by Impala Linear Corporation are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. Impala Linear Corporation makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. Impala Linear Corporation makes no warranty of merchantability or fitness for any purpose. Impala Linear Corporation reserves the right to discontinue production and change specifications and prices at any time and without notice. This product is intended for use in normal commercial applications. Applications requiring an extended temperature range, unusual environmental requirements, or high reliability applications, such as military and aerospace, are specif- ically not recommended without additional processing by Impala Linear Corporation. Impala Linear Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in an Impala Linear Corporation product. No other circuits, patents, licenses are implied. Life Support Policy Impala Linear Corporation’s products are not authorized for use as critical components in life support devices or systems. 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use pro- vided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reason- ably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. Package Outline Dimensions Dimensions shown in inches and (mm). 5-Lead plastic surface mount (SOT-23-5)