ZXCL250 ZETEX | Alldatasheet

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Technical content

DESCRIPTION

The ZXCL series are very small low dropout regulators designed for use in low power and severely space limited applications. The devices operate with a low dropout voltage, typically of only 85mV at 50mA load. Supply current is minimised with a ground pin current of only 50µA at full 150mA load. Logic control allows the devices to be shut down, consuming typically less than 10nA. These features make the device ideal for battery powered applications where power economy is critical. The parts have been designed with space sensitive systems in mind. They are available in the ultra small SC70 package, which is half the size of other SOT23 based regulator devices.

FEATURES

  • 5-pin SC70 package for the ultimate in space saving
  • 5-pin SOT23 industry standard pinout
  • Low 85mV dropout at 50mA load
  • 50µA ground pin current with full 150mA load
  • Typically less than 10nA ground pin current on shutdown
  • 2.5, 2.6, 2.8, 3, 3.3 and 4 volts output
  • Very low noise, without bypass capacitor
  • Thermal overload and over-current protection
  • -40 to +85°C operating temperature range For applications requiring improved performance over alternative devices, the ZXCL is also offered in the 5 pin SOT23 package with an industry standard pinout. The devices feature thermal overload and over-current protection and are available with output voltage options between 1.5V and 4V can be provided. Contact Zetex marketing for further information. The ZXCL series are manufactured using CMOS processing, however advanced design techniques mean that output noise is improved even when compared to other bipolar devices.

APPLICATIONS

  • Cellular and Cordless phones
  • Palmtop and laptop computers
  • PDA
  • Hand held instruments
  • Camera, Camcorder, Personal Stereo
  • PCMCIA cards
  • Portable and Battery-powered equipment ULTRA SMALL MICROPOWER SC70 LOW DROPOUT REGULATORS Battery Supply Output Voltage ZXCL TYPICAL APPLICATION CIRCUITPACKAGE FOOTPRINT Total Aea 2.1mm x 2mm =4.2mm Total Aea 2.8mm x 2.9mm =8.12mm

Terminal Voltage with respect to GND V IN -0.3V to 7.0V EN -0.3V to 10V VO -0.3V to 5.5V Output short circuit duration Infinite Continuous Power Dissipation Internally limited Operating Temperature Range -40°C to +85°C Storage Temperature Range -55°C to +125°C

ELECTRICAL CHARACTERISTICS

VIN = VO + 0.5V, typical values at TA = 25 C V (Unless otherwise stated) SYMBOL PARAMETER CONDITIONS LIMITS UNITS MIN TYP MAX VIN Input Voltage (note2) 5.5 V VO Output Voltage IO =1 m A ZXCL250 ZXCL260 ZXCL280 ZXCL300 ZXCL330 ZXCL400 I O = 100mA VO +0 . 5 V<V IN <V IN max. ZXCL250 ZXCL260 ZXCL280 ZXCL300 ZXCL330 ZXCL400 2.450 2.548 2.744 2.940 3.234 3.920 2.425 2.522 2.744 2.910 3.201 3.880 2.5 2.6 2.8 3.0 3.3 4.0 2.550 2.652 2.856 3.060 3.366 4.080 2.575 2.678 2.884 3.090 3.399 4.120 V V O/∆T Output Voltage Temperature Coefficient -15 ppm/°C I O(MAX) Output Current ZXCL250 only 150 100 mA I OLIM Over Current Limit ZXCL250 only 160 105 230 800 750 mA I Q Ground pin current No Load I O = 150mA, IO = 100mA, 120 100 /H9262A /H9262A /H9262A Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum conditions for extended periods may affect device reliability. Package Power Dissipation (T A=25°C) SC70 300mW (Note 1) SOT23-5 450mW (Note 1)

V IN = VO + 0.5V, typical values at TA=25°C (Unless otherwise stated) ZXCL250 ZXCL260 ZXCL280 ZXCL300 ZXCL330 ZXCL400 ISSUE 5 - NOVEMBER 2001 SYMBOL PARAMETER CONDITIONS LIMITS UNITS MIN TYP MAX VDO Dropout Voltage Note 3 ZXCL250 I O=10mA IO=50mA IO=100mA ZXCL260 I O=10mA IO=50mA IO=100mA ZXCL280 I O=10mA IO=50mA IO=100mA ZXCL300 I O=10mA IO=50mA IO=100mA ZXCL330 I O=10mA IO=50mA IO=100mA ZXCL400 I O=10mA IO=50mA IO=100mA 163 155 140 140 140 140 325 310 280 280 280 280 mV mV mV mV mV mV /H9004V LNR Line Regulation V IN=(VO+0.5V) to 5.5V, IO=1mA 0.02 0.1 %/V /H9004VLDR Load Regulation I O=1mA to 100mA 0.01 0.04 %/mA EN Output Noise Voltage f=10Hz to 100kHz, C O=10 µF, 50 µV rms VENH Enable pin voltage for normal operation T A = -40 °C 2.2 10 V V ENL Enable pin voltage for output shutdown 00 . 8 V V ENHS Enable pin hysteresis 150 mV IEN Enable Pin input current V EN =5.5V 100 nA IQSD Shutdown supply current V EN =0V 1 µA TSD Thermal Shutdown Temperature 125 165 °C Device testing is performed at TA=25/H11034C. Device thermal performance is guaranteed by design. Note1: Maximum power dissipation is calculated assuming the device is mounted on a PCB measuring 2 inches square Note 2: Output Voltage will start to rise when V IN exceeds a value or approximately 1.3V. For normal operation, VIN (min) > VOUT (nom) + 0.5V. Note 3: Dropout voltage is defined as the difference between VIN and VO, when VO has dropped 100mV below

-50 -25 0 25 50 75 100 2.79 2.80 2.81 -50 -25 0 25 50 75 100 23.0 23.2 23.4 23.6 23.8 24.0 24.2 24.4 24.6 24.8 25.0 012345 0 25 50 75 100 125 150 0123456 0 25 50 75 100 125 150 175 0.00 0.05 0.10 0.15 0.20 0.25 VIN =3 . 3 V No Load Output Voltage v Temperature Output Voltage (V) Temperature (°C) VIN =3 . 3 V No Load Ground Current v Temperature Gr ound Cur rent (µA) Temperature (°C) No Load Ground Current v Input Voltage Gr ound Cur rent (µA) Input Voltage (V) VIN =3 . 3 V VIN =5 V Ground Current v Load Current Gr ound Cur rent (µA) Load Current (mA) VIN IOUT =1 0 0 m A IOUT =1 m A Input to Output Characteristics Volt age Input Voltage (V) Dropout Voltage v Output Current Dropout Voltage (V) Output Current (mA) ISSUE 5 - NOVEMBER 2001 ZXCL250 ZXCL260 ZXCL280 ZXCL300 ZXCL330 ZXCL400 TYPICAL CHARACTERISTICS (ZXCL280 shown)

-20 -10 0 1 02 03 04 05 06 07 08 09 0 1 0 0 -20 -10 -100 -50 100 100 10 100 1k 10k 100k 1M 0.01 0.1 10 100 1k 10k 100k 1M COUT =1 mF Tr &T f = 2.5ms Line Rejection IL = 100mA DV OUT (mV) V IN (V) Time (ms) VIN =5 V IL = 1mA IL = 100mA Enable VIN = 3.3V IL = 1mA IL = 100mA COUT =1 mF Start-Up Response Voltage (V) Time (µs) COUT =1 mF Tr &T f = 2.5ms DV OUT (mV) V IN (V) Line Rejection IL =1 m A Time (ms) COUT =1 0mF COUT =1 mF COUT =1 0mF COUT =1 mF VIN =5 V IL = 1mA to 50mA Load Response DV OUT (mV) IL(mA) Time (ms) IL = 100mA, COUT =1 mF IL = 100mA, COUT =1 0mF No Load, COUT =1 0mF No Load, COUT =1 mF Output Noise v Frequency Noise µ Hz Frequency (Hz) All Caps Ceramic Surface Mount IL = 50mA COUT =1 mF COUT = 2.2mF COUT =1 0mF Power Supply Rejection v Frequency Power Supply Rejection (dB) Frequency (Hz) TYPICAL CHARACTERISTICS (ZXCL280 shown)

V IN Supply Voltage GND Ground EN Active HIGH Enable input. TTL/CMOS logic compatible. Connect to V IN or logic high for normal operation N/C No Connection V O Regulator Output SC70 Package Suffix – H5 Top View SOT23-5 Package Suffix – E5 Top View GND EN N/C VIN VO1 3 4 GND EN N/C VIN VO1 3 4 CONNECTION DIAGRAMS SCHEMATIC DIAGRAM SC70 Package Suffix –H5 Top View GND EN N/C VIN VO 3 4 ZXCLXXX ZXCL1XXXZXCLXXX

In common with many other LDO regulators, the ZXCL device has an inherent diode associated with the output series pass transistor of each regulator. This diode has its anode connected to the output and its cathode to the input. The internal diode is normally reverse biased, but will conduct if the output is forced above the input by more than a V BE (approximately 0.6V). Current will then flow from Vout to Vin. For safe operation, the maximum current in this diode should be limited to 5mA continuous and 30mA peak. An external schottky diode may be used to provide protection when this condition cannot be satisfied. Increased Output current Any ZXCL series device may be used in conjunction with an external PNP transistor to boost the output current capability. In the application circuit shown below, a FMMT717 device is employed as the external pass element. This SOT23 device can supply up to 2.5A maximum current subject to the thermal dissipation limits of the package (625mW). Alternative devices may be used to supply higher levels of current. Note that with this arrangement, the dropout voltage will be increased by the VBE drop of the external device. Also, care should be taken to protect the pass transistor in the event of excessive output current. ISSUE 5 - NOVEMBER 2001 ZXCL250 ZXCL260 ZXCL280 ZXCL300 ZXCL330 ZXCL400 VIN EN GND VO ZXCL SERIES FMMT717 5.6R 1uF 1uF 1uF VOUTVIN Scheme to boost output current to 2A

APPLICATIONS INFORMATION (Cont) Power Dissipation The maximum allowable power dissipation of the device for normal operation (Pmax), is a function of the package junction to ambient thermal resistance ( θja), maximum junction temperature (Tjmax), and ambient temperature (Tamb), according to the expression: P max = (Tjmax – Tamb) / θja The maximum output current (Imax) at a given value of Input voltage (V IN) and output voltage (V OUT) is then given by I max = Pmax / (VIN - VOUT ) The value ofθja is strongly dependent upon the type of PC board used. Using the SC70 package it will range from approximately 280°C/W for a multi-layer board to around 450°C/W for a single sided board. It will range from 180°C/W to 300°C/W for the SOT23-5 package. To avoid entering the thermal shutdown state, Tj max should be assumed to be 125°C and Imax less than the over-current limit,(IOLIM). Power derating for the SC70 and SOT23-5 packages is shown in the following graph. Capacitor Selection and Regulator Stability The device is designed to operate with all types of output capacitor, including tantalum and low ESR ceramic. For stability over the full operating range from no load to maximum load, an output capacitor with a minimum value of 1µF is recommended, although this can be increased without limit to improve load transient performance. Higher values of output capacitor will also reduce output noise. Capacitors with ESR less than 0.5Ω are recommended for best results. An input capacitor of 1 µF (ceramic or tantalum) is recommended to filter supply noise at the device input and will improve ripple rejection. The input and output capacitors should be positioned close to the device, and a ground plane board layout should be used to minimise the effects of parasitic track resistance. Dropout Voltage The output pass transistor is a large PMOS device, which acts like a resistor when the regulator enters the dropout region. The dropout voltage is therefore proportional to output current as shown in the typical characteristics. Ground Current The use of a PMOS device ensures a low value of ground current under all conditions including dropout, start-up and maximum load. Power Supply Rejection and Load Transient Response Line and Load transient response graphs are shown in the typical characteristics. These show both the DC and dynamic shift in the output voltage with step changes of input voltage and load current, and how this is affected by the output capacitor. If improved transient response is required, then an output capacitor with lower ESR value should be used. Larger capacitors will reduce over/undershoot, but will increase the settling time. Best results are obtained using a ground plane layout to minimise board parasitics. ZXCL250 ZXCL260 ZXCL280 ZXCL300 ZXCL330 ZXCL400 - 4 0 - 2 00 2 04 06 08 0 1 0 0 100 200 300 400 500 SOT23 SC70 Derating Curve Max Power Dissipation (mW) Temperature (°C) ISSUE 5 - NOVEMBER 2001

A 1.00 A1 0.10 0.70 b 0.15 C 0.08 D 2.00BSC E 2.10BSC E1 1.25BSC e 0.65BSC e1 1.30BSC L 0.26 0.46 a° 08 SOT23-5 DIM Millimetres MIN MAX A 0.90 1.45 A1 0.00 0.15 0.90 1.3 b 0.35 0.50 C 0.09 0.20 D 2.80 3.00 E 2.60 3.00 E1 1.50 1.75 e 0.95 REF e1 1.90 REF L 0.10 0.60 a° 01 0

Oldham, OL9 8NP United Kingdom Telephone (44) 161 622 4422 Fax: (44) 161 622 4420 Zetex GmbH Streitfeldstraße 19 D-81673 München Germany Telefon: (49) 89 45 49 49 0 Fax: (49) 89 45 49 49 49 Zetex Inc

700 Veterans Memorial Hwy

Hauppauge, NY11788 USA Telephone: (631) 360 2222 Fax: (631) 360 8222 Zetex (Asia) Ltd 3701-04 Metroplaza, Tower 1 Hing Fong Road Kwai Fong, Hong Kong China Telephone: (852) 26100 611 Fax: (852) 24250 494 These offices are supported by agents and distributors in major countries world-wide. This publication is issued to provide outline information only which (unless agreed by the Company in writing) may not be used, applied or reproduced for any purpose or form part of any order or contract or be regarded as a representation relating to the products or services concerned. The Company reserves the right to alter without notice the specification, design, price or conditions of supply of any product or service. For the latest product information, log on to www.zetex.com © Zetex plc 2001 ZXCL250 ZXCL260 ZXCL280 ZXCL300 ZXCL330 ZXCL400

ORDERING INFORMATION

V Package Partmarking ZXCL250H5 2.5 SC70 L25A ZXCL260H5 2.6 SC70 L26A ZXCL280H5 2.8 SC70 L28A ZXCL300H5 3.0 SC70 L30A ZXCL330H5 3.3 SC70 L33A ZXCL400H5 4.0 SC70 L40A ZXCL1250H5 2.5 SC70 L25C ZXCL1260H5 2.6 SC70 L26C ZXCL1280H5 2.8 SC70 L28C ZXCL1300H5 3.0 SC70 L30C ZXCL1330H5 3.3 SC70 L33C ZXCL1400H5 4.0 SC70 L40C ZXCL250E5 2.5 SOT23-5 L25B ZXCL260E5 2.6 SOT23-5 L26B ZXCL280E5 2.8 SOT23-5 L28B ZXCL300E5 3.0 SOT23-5 L30B ZXCL330E5 3.3 SOT23-5 L33B ZXCL400E5 4.0 SOT23-5 L40B