ZXCL200 ZETEX | Alldatasheet
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Technical content
DESCRIPTION
The ZXCL200 is a very small 2 volt regulator designed for use in low power and severely space limited applications. Supply current is minimised with a ground pin current of only 40µA at full 100mA load. Logic control allows the device to be shut down, consuming typically less than 10nA. These features make it ideal for battery powered applications where power economy is critical. The part has been designed with space sensitive systems in mind. It is 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
- 40µA ground pin current with full 100mA load
- Typically less than 10nA ground pin current on shutdown
- 2 volt 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 ZXCL200 is also offered in the 5 pin SOT23 package with an industry standard pinout. The device features thermal overload and over-current protection. The ZXCL200 is 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 equipmenth ISSUE 1 - SEPTEMBER 2001 ZXCL200 ULTRA SMALL MICROPOWER SC70 2V 100mA REGULATOR 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 VIN -0.3V to 7.0V EN -0.3V to 10V VO -0.3V to 5.5V Package Power Dissipation (TA=25°C) SC70 300mW (Note 1) SOT23-5 450mW (Note 1) Output short circuit duration Infinite Continuous Power Dissipation Internally limited Operating Temperature Range -40 /H11034C to + 85/H11034C Storage Temperature Range -55 /H11034C to + 125/H11034C 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. ZXCL200 ISSUE 1 - SEPTEMBER 2001 SYMBOL PARAMETER CONDITIONS LIMITS UNITS MIN TYP MAX VIN Input Voltage T A=-40 /H11034C (note2) 5.5 V VO Output Voltage (Note 3) IO =1 m A IO = 100mA VO +0.5V < V IN <V IN max 1.96 1.94 22 . 0 4 2.06 V V ∆VO/∆T Output Voltage Temperature Coefficient -15 ppm/°C I O(MAX) Output Current 100 mA IOLIM Over Current Limit 105 750 mA IQ Ground pin current No Load IO = 100mA 100 /H9262A /H9262A /H9004VLNR 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 TA = -40 °C 2.2 10 V VENL Enable pin voltage for output shutdown 00 . 8 V
ELECTRICAL CHARACTERISTICS
VIN = VO + 0.5V, typical values at TA=25°C (Unless otherwise stated) Device testing is performed at T A=25 /H11034C. Device thermal performance is guaranteed by design. Note 1: 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, V IN (min) > V OUT (nom) + 0.5V. Note 3: Nominal value of V O is defined at V IN =VO+0.5V.
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 regulators, the ZXCL200 device has an inherent diode associated with the output series pass transistor. 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. ZXCL200 ISSUE 1 - SEPTEMBER 2001 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 Imax = 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. 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. ZXCL200 ISSUE 1 - SEPTEMBER 2001 - 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)
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 Suite 315
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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 ZXCL200 PACKAGE DIMENSIONS SC70 DIM Millimetres MIN MAX 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 DEVICE Output Voltage V Package Partmarking ZXCL200H5 2.0 SC70 L20A ZXCL1200H5 2.0 SC70 L20C ZXCL200E5 2.0 SOT23-5 L20B