ISL9021AIRUNZ-T7A

DATASHEET ISL9021A FN7845 Rev 3.00 December 20, 2012 250mA Single LDO with Low IQ, Low Noise and High PSRR LDO The ISL9021A is a single LDO, which provides high performance, low input voltage and high PSRR. It delivers guaranteed continuous 250mA load current and is stable with 1µF to 4.7µF of output capacitance (±30%) with an ESR range of 5m to 400m. Features The input voltage range for the ISL9021A is between 1.5V to 5.5V and the output voltage comes in many fixed voltage options with ±1.8% accuracy over-temperature, line and load ranges. The ISL9021A has typical PSRR of 75dB @ 10kHz and 50dB @ 1MHz. • Output voltage range: 1.2V to 3.3V The reverse current protection feature prevents current from flowing back to the power source when the output voltage is pulled higher than the input. • Stable with 1µF to 4.7µF output capacitance (±30%) with an ESR range of 5m to 400m The ISL9021A is offered in tiny 4-bump 0.975mmx1.155mm WLCSP and 1.6mmx1.6mm 6 Ld µTDFN packages. • Soft-start limits input current surge during enable Related Literature • -40°C to +85°C operating temperature range • See FN6867, ISL9021 “250mA Single LDO with Low IQ, Low Noise and High PSRR LDO” • Available in 0.975mmx1.155mm 4-bump WLCSP package and 1.6mmx1.6mm 6 Ld µTDFN • High performance LDO with 250mA guaranteed continuous output current • Input voltage range: 1.5V to 5.5V • High PSRR: 75dB @ 10kHz, 50dB @ 1MHz • Low quiescent current: 35µA • Dropout voltage: 1.8V 150 250 mV 160 °C 20 °C VIN = 4.5V, VO = 3.3V @ 1kHz 60 dB VIN = 4.5V, VO = 3.3V @ 10kHz 75 dB VIN = 4.5V, VO = 3.3V @ 1MHz 50 dB 8.5*VO µVRMS Thermal Shutdown Hysteresis AC CHARACTERISTICS Ripple Rejection (Note 8) VIN = 4.2V, TA = +25°C, BW = 10Hz to 100kHz, IO = 10mA Output Noise Voltage (Note 8) DEVICE START-UP CHARACTERISTICS Device Enable Time tEN Time from assertion of the EN pin to when the output voltage reaches 95% of the VO (nom) LDO Soft-start Ramp Rate tSSR Slope of linear portion of LDO output voltage ramp during start-up FN7845 Rev 3.00 December 20, 2012 250 600 µs 30 60 µs/V Page 5 of 12 ISL9021A Electrical Specifications TA = -40°C to +85°C; VIN = (VO + 0.5V) to 5.5V with a minimum VIN of 1.5V; CIN = 1µF; CO = 1µF. Boldface limits apply over the operating temperature range, -40°C to +85°C. (Continued) PARAMETER SYMBOL MIN (Note 10) TEST CONDITIONS TYP MAX (Note 10) UNIT 0.4 V EN LOGIC CHARACTERISTICS Input Low Voltage VIL Input High Voltage VIH Input Leakage Current 1.1 V IIL, IIH 0.1 µA NOTES: 8. Limits established by characterization and are not production tested. 9. Dropout voltage is measured as VIN - VO, when VO is 4% lower than the value of VO 10. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization and are not production tested. Typical Operating Performance 40 T = ROOM TEMP T = +45°C 45 T = +85°C QUIESCENT CURRENT (µA) QUIESCENT CURRENT (µA) 45 35 30 25 T = 0°C 20 15 T = -25°C T = -40°C 10 5 0 1.5 2.5 3.5 4.5 INPUT VOLTAGE (V) T = +45°C T = 0°C 20 15 T = -40°C T = -25°C 10 5 1.5 1.90 40 2.5 3.5 4.5 INPUT VOLTAGE (V) 5.5 +25°C +85°C 1.85 30 T = 0°C 20 T = -40°C T = -25°C 10 1.80 -40°C 1.75 1.70 0 -10 3.5 25 1.95 T = +85°C Vo (V) QUIESCENT CURRENT (µA) T = ROOM TEMP 30 FIGURE 3. QUIESCENT CURRENT vs INPUT VOLTAGE (VOUT = 1.85V) FIGURE 2. QUIESCENT CURRENT vs INPUT VOLTAGE (VOUT = 0.9V) 50 35 0 5.5 T = +85°C T = +45°C T = ROOM TEMP 40 1.65 4.0 4.5 5.0 INPUT VOLTAGE (V) 5.5 FIGURE 4. QUIESCENT CURRENT vs INPUT VOLTAGE (VOUT = 3.3V) FN7845 Rev 3.00 December 20, 2012 6.0 1.60 0 50 100 150 Io (mA) 200 250 FIGURE 5. LOAD REGULATION vs TEMPERATURE (VOUT = 1.85V) Page 6 of 12 300 ISL9021A Typical Operating Performance (Continued) 3.5 2.00 1.95 1.90 3.4 +25°C 1.80 +85°C Vo (V) Vo (V) +85°C 3.3 1.85 1.75 +25°C -40°C 1.70 1.65 3.2 -40°C 3.1 3.0 1.60 2.9 1.55 1.50 2.5 3.5 4.5 5.5 2.8 6.5 0 50 100 3.50 1.05 3.45 1.00 3.40 +85°C 3.30 3.25 -40°C 0.75 0.70 3.05 0.65 4.5 5.0 +25°C +85°C 5.5 6.0 -40°C 0.80 3.10 4.0 300 0.85 3.15 3.00 3.5 250 0.90 Vo (V) Vo (V) 0.95 +25°C 3.20 200 FIGURE 7. LOAD REGULATION vs TEMPERATURE (VOUT = 3.3V) FIGURE 6. LINE REGULATION vs TEMPERATURE (VOUT = 1.85V) 3.35 150 Io (mA) VIN(V) 0.60 0 50 VIN (V) 100 150 200 250 FIGURE 8. LINE REGULATION vs TEMPERATURE (VOUT = 3.3V) FIGURE 9. LOAD REGULATION vs TEMPERATURE (VOUT = 0.9V) VIN = 2.7V 1.00 0.95 VOUT = 1.85V +85°C 0.90 Vo (V) COUT = 1µF VOUT +25°C 0.85 -40°C 0.80 0.75 0.70 3.0 IOUT 3.5 4.0 4.5 5.0 5.5 6.0 IOUT = 1mA TO 250mA VIN (V) FIGURE 10. LINE REGULATION vs TEMPERATURE (VOUT = 0.9V) FN7845 Rev 3.00 December 20, 2012 300 Io (mA) FIGURE 11. LOAD TRANSIENT RESPONSE Page 7 of 12 ISL9021A Typical Operating Performance (Continued) VIN = 2.7V COUT = 4.7µF VOUT = 1.85V VOUT IOUT IOUT = 1mA TO 250mA FIGURE 12. LOAD TRANSIENT RESPONSE FIGURE 13. ENABLE FUNCTION (VIN = 3.6V, VOUT = 1.85V, COUT 1µF) -20 -30 VIN = 4.5VDC + 50mVAC COUT = 1µF PSRR (dB) -40 IO = 10mA -50 -60 -70 IO = 0A -80 -90 100 1k 10k 100k 1M FREQUENCY (Hz) FIGURE 14. POWER SUPPLY REJECTION vs FREQUENCY FN7845 Rev 3.00 December 20, 2012 Page 8 of 12 ISL9021A Functional Description The ISL9021A is a high performance low-dropout regulator (LDO) with 250mA sourcing capability. The extra low ground current makes this part a good choice for handheld product applications. The device also incorporates overcurrent, thermal shutdown, reverse current protections, and soft-start features. Thermal shutdown protects the device against overheating. Soft-start limits the start-up input current surges. In some applications, the output voltage may be externally pulled higher than the input, or the input voltage could be connected to ground, or connected to some voltage lower than the output side. The ISL9021A features reverse current protection; that can block the reverse current from output to input. Enable Control The ISL9021A has an enable pin. When EN is low, the IC is in shutdown mode. In this condition, all on-chip circuits are off, and the device draws minimum current, typically less than 0.1µA(typ). Driving this pin high will turn on the device. LDO Protections The ISL9021A offers several protection functions, making it ideal for use in battery-powered applications. The ISL9021A provides short-circuit protection by limiting the output current at current limit of 260mA (min). If the short circuit lasts long enough, the die temperature increases, and the over-temperature protection circuit will shut down the output. When the die temperature reaches about +145°C, thermal protection starts to work with output being loaded with at least 50mA. Once the die temperature drops to about +110°C, the LDO will resume operation beginning with a soft-start. FN7845 Rev 3.00 December 20, 2012 The ISL9021A’s reverse current protection is intended to block reverse conduction if output voltage is higher than input voltage. Input and Output Capacitors The ISL9021A provides a linear regulator that has low quiescent current, fast transient response, and overall stable operation across the recommended operating conditions. A ceramic capacitor (X5R or X7R) with a capacitance of 1µF to 4.7µF with an ESR up to 400m is suitable for the ISL9021A to maintain its output stability. The ground connection of the output capacitor should be routed directly to the GND pin of the device, and also placed close to the IC. Similarly for the input capacitor, usually a 1µF ceramic capacitor (X5R or 7R) is suitable for most cases, but if a large, fast rising load transient condition is expected, a higher value input capacitor may be necessary to achieve satisfactory performance. Board Layout Recommendations A good PCB layout is an important step to achieve good performance. It is recommended to design the board with separate ground planes for input and output, and connect both ground planes at the GND pin of the IC. Consideration should be taken when placing the components and routing the trace to minimize the ground impedance, and keep the parasitic inductance low. Usually the input/output capacitors should be placed as close to the IC as possible with a good ground connection. Page 9 of 12 ISL9021A Revision History The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to web to make sure you have the latest revision. DATE REVISION CHANGE December 17, 2012 FN7845.3 Added evaluation boards and ISL9021AIIUZ-T to “Ordering Information” on page 3. December 2, 2011 FN7845.2 Changed CSP package dimension from “2mmx2mm” to “0.975mmx1.155mm” on page 1 to page 3. October 7, 2011 FN7845.1 Updated “Ordering Information” on page 3 by adding ISL9021AIRUYZ-T and ISL9021AIRUYZ-T7A parts. Made corrections to part markings and added -T7A parts. May 27, 2011 FN7845.0 Initial Release About Intersil Intersil Corporation is a leader in the design and manufacture of high-performance analog, mixed-signal and power management semiconductors. The company's products address some of the fastest growing markets within the industrial and infrastructure, personal computing and high-end consumer markets. For more information about Intersil or to find out how to become a member of our winning team, visit our website and career page at www.intersil.com. For a complete listing of Applications, Related Documentation and Related Parts, please see the respective product information page. Also, please check the product information page to ensure that you have the most updated datasheet: ISL9021A To report errors or suggestions for this datasheet, please go to: www.intersil.com/askourstaff Reliability reports are available from our website at: http://rel.intersil.com/reports/search.php © Copyright Intersil Americas LLC 2011-2012. All Rights Reserved. All trademarks and registered trademarks are the property of their respective owners. For additional products, see www.intersil.com/en/products.html Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted in the quality certifications found at www.intersil.com/en/support/qualandreliability.html Intersil products are sold by description only. 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For information regarding Intersil Corporation and its products, see www.intersil.com FN7845 Rev 3.00 December 20, 2012 Page 10 of 12 ISL9021A Package Outline Drawing L6.1.6x1.6 6 LEAD ULTRA THIN DUAL FLAT NO-LEAD COL PLASTIC PACKAGE (UTDFN COL) Rev 1, 11/07 2X 1.00 1.60 A 6 PIN 1 INDEX AREA PIN #1 INDEX AREA 6 B 4X 0.50 1 3 5X 0 . 40 ± 0 . 1 1X 0.5 ±0.1 1.60 (4X) 0.15 4 6 0.10 M C A B TOP VIEW 4 0.25 +0.05 / -0.07 BOTTOM VIEW ( 6X 0 . 25 ) SEE DETAIL "X" ( 1X 0 .70 ) 0 . 55 MAX 0.10 C C BASE PLANE (1.4 ) SIDE VIEW ( 5X 0 . 60 ) C SEATING PLANE 0.08 C 0 . 2 REF 0 . 00 MIN. 0 . 05 MAX. DETAIL "X" ( 4X 0 . 5 ) TYPICAL RECOMMENDED LAND PATTERN NOTES: 1. Dimensions are in millimeters. Dimensions in ( ) for Reference Only. 2. Dimensioning and tolerancing conform to AMSE Y14.5m-1994. 3. Unless otherwise specified, tolerance : Decimal ± 0.05 4. Dimension b applies to the metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip. 5. Tiebar shown (if present) is a non-functional feature. 6. The configuration of the pin #1 identifier is optional, but must be located within the zone indicated. The pin #1 identifier may be either a mold or mark feature. FN7845 Rev 3.00 December 20, 2012 Page 11 of 12 ISL9021A Wafer Level Chip Scale Package (WLCSP 0.4mm Ball Pitch) W2x2.4 2x2 ARRAY 4 BALL WAFER LEVEL CHIP SCALE PACKAGE D E PIN 1 TOP VIEW SYMBOL MILLIMETERS A 0.44 Min, 0.495 Nom, 0.55 Max A1 0.190 ±0.030 A2 0.305 ±0.025 b 0.270 ±0.030 D 1.155 ±0.020 D1 0.400 BASIC E 0.975 ±0.020 E1 0.400 BASIC e 0.400 BASIC SD 0.200 BASIC SE 0.00 BASIC NUMBER OF BUMPS: 4 Rev. 2 6/08 A2 A1 A NOTES: 1. All dimensions are in millimeters. b SIDE VIEW e ( D1 ) 2 SE e ( E1 ) 1 B A b SD BOTTOM VIEW FN7845 Rev 3.00 December 20, 2012 Page 12 of 12