INTEGRATED CIRCUITS SA57026 300 mA LDO with ON/OFF control and independent delayed RESET function Product data Supersedes data of 2001 Oct 03 2003 Oct 13 Philips Semiconductors Product data 300 mA LDO with ON/OFF control and independent delayed RESET function SA57026 GENERAL DESCRIPTION The SA57026 has an extremely precise fixed output with a typical accuracy of ±2%. It is designed to provide very low dropout and low noise in CD-ROM drives, battery-operated systems, and portable computers applications. This regulator consists of an internal voltage reference, an error amplifier, a driver with current limiter, and a thermal shut-down mechanism. An Active-LOW RESET is assered when the detected voltage (VDET) falls below the reset voltage threshold. The RESET output remains low for 30 µs (typical) when zero capacitance connected to Cd pin. The reset time delay can be adjusted by replacing cpacitance values from Cd pin to Ground. The device is available in the 7-pin small outline package (SOP002). FEATURES APPLICATIONS • Very low dropout voltage: 500 mV typ. (Iout = 50 mA) • High precision output voltage: ±2% • Output current capacity: 300 mA • Low noise: 40 mVrms typ. @ 20 Hz to 80 KHz and for Cn = 10 nF • Extremely good line regulation: 10 mV typical • Extremely good load regulation: 20 mV typical • Low temperature drift co-efficient to Vout: ±100 ppm/°C • Internal current limit and thermal shut-down circuits • Adjustment-free reset detection voltage: 4.2 V typ. • Delay time can be adjusted by external capacitor • Wide operating temperature range: –40 °C to +85 °C • CD-ROM drives • Electronic notebooks, PDAs and palmtop computers • Cameras, VCRs and camcorders • PCMCIA cards • Modems • Battery-operated or hand-held instruments BLOCK DIAGRAM 4 VIN 5 VOUT 2 RESET 1 GND ON/OFF 3 THERMAL PROTECT 7 Cd SL01528 Figure 1. Block diagram. 2003 Oct 13 2 Philips Semiconductors Product data 300 mA LDO with ON/OFF control and independent delayed RESET function SA57026 ORDERING INFORMATION PACKAGE TYPE NUMBER SA57026 DESCRIPTION VERSION TEMPERATURE RANGE small outline 7-pin surface mount (see dimensional drawing) SOP002 –40 to +85 °C NOTE: The device has two reset threshold options. Part number marking XX Output voltage (Typ.) Reset threshold (Typ.) SA57026D 3.3 V 4.20 V SA57026F 3.3 V 3.90 V PIN CONFIGURATION GND 1 RESET 2 ON/OFF 3 VIN 4 Part number Marking SA57026DD ALU SA57026FD ALV PIN DESCRIPTION 7 SA57026 Cd 6 GND 5 VOUT PIN SYMBOL 1 GND 2 RESET RESET signal output pin. The output remains low while VDET is below the reset voltage threshold, and for an extnerl set time delay Cd pin after VDET rises above reset threshold. 3 ON/OFF Output voltage on/off control pin. Connect to VIN if not used. ON/OFF = LOW: Voltage output (Pin 5) OFF ON/OFF = HIGH: Voltage output (Pin 5) ON 4 VIN 5 VOUT Regulated voltage output pin. 6 GND Ground pin and heat sink. 7 Cd SL01529 Figure 2. Pin configuration. DESCRIPTION Ground. Voltage supply input pin. Reset delay time capacitor pin. RESET pin output delay time can be set by capacitance connected to the Cd pin. tPLH = 100000 x C tPLH: transmission delay time (s). C: capacitor value (F). MAXIMUM RATINGS SYMBOL PARAMETER MIN. MAX. UNIT –0.3 +10 V VIN Supply voltage IOUT Output current 0 400 mA Toper Operating temperature –40 +85 °C Tstg Storage temperature –40 +125 °C PD Power dissipation (Note 1) – 800 mW NOTE: 1. When mounted on a 25 × 40 × 1 mm glass epoxy board. 2003 Oct 13 3 Philips Semiconductors Product data 300 mA LDO with ON/OFF control and independent delayed RESET function SA57026 ELECTRICAL CHARACTERISTICS Tamb = 25 °C; VON/OFF = 1.6 V, unless otherwise specified. SYMBOL PARAMETER Iccq1 No-load input current 1 Iccq2 No-load input current 2 Iccq3 Input current (OFF) CONDITIONS MIN. TYP. MAX. UNIT VIN = 5 V; IOUT = 0 mA – 3 8 mA VIN = 4 V; IOUT = 0 mA – 4 – mA VIN = 5 V; VON/OFF = 0.4 V – 250 – µA VIN = 5 V; IOUT = 30 mA SA57026D SA57025F 3.25 3.25 3.30 3.30 3.35 3.35 V V VIN = 3.2 V; IOUT = 150 mA – 0.15 0.3 V Regulator VOUT Output voltage VIO Input/output differential voltage V1 Line regulation VIN = 4.4 to 5.5 V; IOUT = 30 mA – 10 20 mV V2 Load regulation VIN = 5 V; IOUT = 0 to 300 mA – 20 120 mV ∆VOUT/∆T VOUT Temperature coefficient (Note 1) Tj = –20 to +85 °C; VIN = 5 V – 100 – ppm/°C RR Ripple rejection (Note 1) VIN = 5 V; f = 120 Hz; Vripple = 1 Vp–p; IOUT = 30 mA – 50 80 dB Vn Output noise voltage (Note 1) VIN = 5 V; f = 20 to 80 kHz; Vripple = 1 Vp–p; IOUT = 30 mA – 40 120 µVrms ION ON/OFF terminal current VON/OFF = 1.6 V – 5 10 µA Vth(H) HIGH threshold voltage 1.6 – VIN+0.3 V Vth(L) LOW threshold voltage –0.3 – 0.4 V VIN = HIGH-to-LOW SA57026D SA57025F 4.11 3.81 4.20 3.90 4.29 3.99 V V Tj = –20 to +85 °C – 100 – ppm/°C VIN = HIGH-to-LOW-to-HIGH 100 – 200 mV VIN = 3.9 V; RL = 4.7 kΩ – 100 200 mV VIN = 5 V – – ±0.1 µA Reset VDET Detection voltage ∆VS/∆T VS temperature coefficient (Note 1) ∆VS Hysteresis voltage VOL LOW-level output voltage ILO Output leakage current IOL1 LOW-level output current 1 VIN = 3.9 V; RL = 0 Ω 5 – – mA IOL2 LOW-level output current 2 (Note 1) VIN = 3.9 V; RL = 0 Ω; Tamb = –20 to +80 °C 3 – – mA tPLH LOW-to-HIGH transmission delay time (Note 1) Cd = 0.0 µF – 30 90 µs tPLH1 Reset delay time VIN = 4 V to 5 V; Cd = 0.1 µF 5 10 20 ms tPHL HIGH-to-LOW transmission delay time (Note 1) – 30 90 µs VOPL Threshold operating voltage – 0.65 0.85 V VOL = 0.4 V NOTE: 1. The parameter is guaranteed by design. 2003 Oct 13 4 Philips Semiconductors Product data 300 mA LDO with ON/OFF control and independent delayed RESET function SA57026 APPLICATION INFORMATION RESET output delay operation with an external capacitor from Cd pin to GND When the supply voltage crosses the release voltage (VDET) from a low value to a value higher than the released voltage (VDET), the Cd pin voltage starts to increase (charges up the external capacitor). While the RESET output remains at LOW state condition until the Cd pin voltage reaches the threshold operating voltage (VOPL) 0.4 V typical; after that, the RESET output is reversed to HIGH state condition. Input capacitor An input capacitor of ≥1 µF is required to eliminate the AC coupling noise. This capacitor must be located as close as possible to VIN or GND pin (not more than 1 cm) and returned to a clean analog ground. Any good quality ceramic, tantalum or film capacitor will work. Output capacitor Phase compensation is made for securing stable operation, even if the load current varies. For this reason, an output capacitor with good frequency characteristics is needed. Set it as close to the circuit as possible, with wires as short as possible. The transmission delay time (tPLH) can be set with the capacitance Cd of an external cpacitor as shown in Equation (1): t PLH + 10 6 Tha value of the output capacitance has to be at least 47 µF connected from VOUT to GND. When operating from sources other than batteries, supply-noise rejection and transient response can be improved by increasing the value of the input and output capacitors and employing passive filtering techniques. Eqn. (1) C (Time is expressed in seconds; capacitance in Farads.) PCB layout The component placement around the LDO should be done carefully to achieve good dynamic line and load response. The input and noise capacitors should be kept close to the LDO. ON/OFF The regulator is fully enabled when a logic HIGH is applied to this input. The regulator enters shutdown when a logic LOW is appplied to this input. During shutdown, regulator output voltage falls to zero, RESET remains valid and supply current is reduced to 5 µA (typ). If the function is not to be used, the ON/OFF pin should be tied to VIN. The rise in junction temperature depends on how efficiently the heat is carried away from the junction to ambient. The junction to lead thermal impedance is a characteristic of the package and fixed. The thermal impedance between lead to ambient can be reduced by increasing the copper area on the PCB. Increase the input, output and ground trace area to reduce the junction-to-ambient impedance. RESET output The SA57066 has an Active-LOW RESET output. The RESET output is driven Active-LOW within 30 µs typical (when Cd is zero capacitance). The time delay can be adjusted up to 10 ms typical (when Cd is 0.1 µF) of VDET falling through the reset voltage threshold. RESET is maintained Active-HIGH after VDET rises above thre reset threshold. VIN 4 C 1 µF 5 R 4.7 kΩ VOUT SA57026 2 7 COUT 47 µF Cd RESET 3 1 6 R C 0.1 µF ON/OFF SL01530 Figure 3. Typical application circuit. 2003 Oct 13 5 Philips Semiconductors Product data 300 mA LDO with ON/OFF control and independent delayed RESET function SA57026 PACKING METHOD The SA57026 is packed in reels, as shown in Figure 4. GUARD BAND TAPE REEL ASSEMBLY TAPE DETAIL COVER TAPE CARRIER TAPE BARCODE LABEL BOX SL01305 Figure 4. Tape and reel packing method 2003 Oct 13 6 Philips Semiconductors Product data 300 mA LDO with ON/OFF control and independent delayed RESET function SA57026 Plastic small outline package; 7 leads; body width 4.4 mm 2003 Oct 13 7 SOP002 Philips Semiconductors Product data 300 mA LDO with ON/OFF control and independent delayed RESET function SA57026 REVISION HISTORY Rev Date Description _2 20031013 Product data (9397 750 12113). ECN 853-2292 30327 of 09 September 2003. Modifications: • Change package name from SOP-7B to SOP002 in Ordering information and Package outline sections. _1 20011003 Product data (9397 750 08968). ECN 853-2292 27197 of 03 October 2001. Data sheet status Level Data sheet status [1] Product status [2] [3] Definitions I Objective data Development This data sheet contains data from the objective specification for product development. Philips Semiconductors reserves the right to change the specification in any manner without notice. II Preliminary data Qualification This data sheet contains data from the preliminary specification. Supplementary data will be published at a later date. Philips Semiconductors reserves the right to change the specification without notice, in order to improve the design and supply the best possible product. III Product data Production This data sheet contains data from the product specification. Philips Semiconductors reserves the right to make changes at any time in order to improve the design, manufacturing and supply. Relevant changes will be communicated via a Customer Product/Process Change Notification (CPCN). [1] Please consult the most recently issued data sheet before initiating or completing a design. [2] The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at URL http://www.semiconductors.philips.com. [3] For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status. Definitions Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Disclaimers Life support — These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Right to make changes — Philips Semiconductors reserves the right to make changes in the products—including circuits, standard cells, and/or software—described or contained herein in order to improve design and/or performance. When the product is in full production (status ‘Production’), relevant changes will be communicated via a Customer Product/Process Change Notification (CPCN). Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Koninklijke Philips Electronics N.V. 2003 All rights reserved. Printed in U.S.A. Contact information For additional information please visit http://www.semiconductors.philips.com. Fax: +31 40 27 24825 Date of release: 10-03 For sales offices addresses send e-mail to: [email protected]. Document order number: 2003 Oct 13 8 9397 750 12113