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| ST2L01 DUAL VOLTAGE REGULATOR s s s s s s s s s s VOUT1 = +3.3V FIXED VOUT2 = 1.25 TO 3.0V ADJUSTABLE GUARANTEED OUTPUT1 CURRENT: 1A GUARANTEED OUTPUT2 CURRENT: 1A 2% OUTPUT TOLERANCE (AT 25C) TYPICAL DROPOUT 1.1V (IOUT1 = IOUT2 =1A) INTERNAL POWER AND THERMAL LIMIT STABLE WITH LOW ESR OUTPUT CAPACITOR OPERATING TEMPERATURE RANGE: 0C TO 125C AVAILABLE IN PPAK AND SPAK-5L (PowerFlexTM) PACKAGE PPAK SPAK-5L (PowerFlexTM) DESCRIPTION Specifically designed for data storage applications, this device integrates two voltage regulators, each one able to supply 1A. It is assembled in PPAK and in a new surface mounting package named SPAK (PowerFlexTM) at 5 pins. The first regulator block supply 3.3V to power the Read Channel and Memory Chips requiring this voltage. The second one is an Adjustable output voltage from 1.25V to 3.0V that could power several kind of different micro-controllers. Both outputs are current limited and overtemperature protected. The very good thermal performances of the package SPAK with only 2C/W of Thermal Resistance Junction to Case is important to underline. SCHEMATIC DIAGRAM Over current Protection VREF1 Err-Amp Power Output RA VOUT1 Thermal Protection RB GND VREF2 Err-Amp Power Output VOUT2 Over current Protection ADJ March 2002 1/12 ST2L01 ABSOLUTE MAXIMUM RATINGS Symbol VIN VESD Tstg TJ Input Voltage ESD Tolerance (Human Body Model) Storage Temperature Range Operating Junction Temperature Range Parameter Value 10 4 -55 to +125 0 to +125 Unit V KV C C GENERAL OPERATING CONDITION Symbol VIN VIN tr tf Input Voltage Input Voltage Ripple Input Voltage Rise Time (10% to 90%) Input Voltage Fall Time (90% to 10%) Parameter Value 4.75 to 5.25 0.15 1 1 Unit V V s s THERMAL DATA Symbol Rthj-case Parameter Thermal Resistance Junction-case SPAK-5L 2 PPAK 8 Unit C/W CONNECTION DIAGRAM (top view) PPAK SPAK-5L PIN DESCRIPTION Pin N 1 2 3 4 5 Symbol VI ADJ GND VO2 VO1 Name and Function Input pin: bypass with a 1F capacitor to GND ADJ pin: resistor divider connection Ground pin Output Pin: adjustable output voltage; bypass with a 1F capacitor to GND Output Pin: fixed (3.3V) output voltage; bypass with a 1F capacitor to GND ORDERING INFORMATION TYPE ST2L01 (*) Available in Tape & Reel with the suffix "R" SPAK (Power FlexTM) 5 leads (*) ST2L01K5 PPAK (*) ST2L01PT 2/12 ST2L01 TYPICAL APPLICATION CIRCUIT R1 VO = VREF (1 + )+IADJR1 R2 Note: CO1 value could be lowered down to 470nF Ceramic Capacitor (X7R); CI, CO1 and CO2 capacitors must be located not more than 0.5" from the outputs pins of the device. For more details about Capacitors read the "Application Hints" ELECTRICAL CHARACTERISTICS OF OUTPUT 1 (VI=5V, IO1=10mA Tj = 0 to 125C unless otherwise specified. Typical values are referred at Tj = 25C, CI = 1F (Tantalum), C O1 = C O1 =1F (X7R) Symbol II VO1 Parameter Input Current Output Voltage 1 IO1 = IO2 =0 Tj = 25C IO1 = 5mA to 1A Tj = 0 to 125C VO1 VD1 tTR ISC1 IO1 SVR1 Line Regulation 1 Dropout Voltage 1 Transient Response Current Limit 1 Minimum Load Current 1 Supply Voltage Rejection VI = 4.75 to 5.25V IO = 0.01 to 1A (Note 1) IO = 1A Tj = 0 to 125C (Note 2) IO = 10 to 500mA trise = tfall = 1s (Note 3, 5) RL = 0 Tj = 0 to 125C Tj = 0 to 125C VI = 5 0.25V IO1 = 100 mA Tj = 0 to 125C (Note 5) IO = 1A, (Note 4) fI = 100Hz fI = 1KHz fI = 10KHz fI = 100KHz VOUT1 Load Regulation 1 Test Conditions Tj = 0 to 125C 3.23 VI = 4.75 to 5.25V 3.2 Min. Typ. 15 3.3 3.3 0.1 3 1.1 <1 1 0 60 60 50 30 68 70 65 38 0.1 40 0.5 0.3 %/W Vrms %VO %VO Max. 28 3.37 3.4 6 12 1.3 mV mV V s A mA dB Unit mA V Thermal Regulation eN1 VO1 VO1 Output Noise Temperature Stability Long Term Stability tPULSE = 30ms (Note 5) B= 10Hz to 10KHz (Note 5) Tj = 0 to 125C (Note 5) Tj = 125C, 1000Hrs (Note 5) Note 1: Low duty cycle pulse testing with Kelvin connections are required in order to maintain accurate data Note 2: Dropout Voltage is defined as the minimum differential voltage between V I and VO required to mantain regulation at VO. It is measured when the output voltage drops 1% below its nominal value. Note 3: Transient response is defined with a step change in load from 10mA to 500mA as the time from the load step until the output voltage reaches it's minimum value. Note 4: Minimum load current is defined as the minimum current required at the output in order for the output voltage to maintain regulation. Note 5: Guaranteed by design, not tested in production. 3/12 ST2L01 ELECTRICAL CHARACTERISTICS OF OUTPUT 2 (VI=5V, IO2=10mA Tj = 0 to 125C unless otherwise specified. Typical values are referred at Tj = 25C, CI = 1F (Tantalum), CO1 = CO1 =1F (X7R). Refer to "Typical Application Circuit "figure with R1=R2=120". Symbol VI VO2 VREF Parameter Operating Input Voltage Output Voltage 2 Reference Voltage (measured between pins 4 and 2) Line Regulation 2 Load Regulation 2 Dropout Voltage 2 Transient Response Current Limit 2 Minimum Load Current 2 Adjust Pin Current Adjust Pin Current Supply Voltage Rejection Tj = 25C Tj = 25C IO1 = 5mA to 1A Tj = 0 to 125C VI = 4.75 to 5.25V IO = 0.01 to 1A (Note 1) IO = 1A Tj = 0 to 125C (Note 2) IO = 10 to 500mA trise = tfall = 1s (Note 3, 5) RL = 0 Tj = 0 to 125C Tj = 0 to 125C Tj = 0 to 125C IO1 = 5mA to 1A Tj = 0 to 125C VI = 5 0.25V IO1 = 100 mA Tj = 0 to 125C (Note 5) IO = 1A, VI = 4.75 to 5.25V fI = 100Hz fI = 1KHz fI = 10KHz fI = 100KHz 70 70 50 30 (Note 4) VI = 4.75 to 5.25V Test Conditions IO2 =5mA to 1A Tj = 0 to 125C Min. 4.5 2.45 1.225 1.2125 2.5 1.25 1.25 0.004 0.08 1.1 <1 1 1 35 0 77 80 65 43 0.1 30 0.5 0.3 %/W Vrms %VO %VO 120 5 2.55 1.275 1.2875 0.2 0.4 1.3 % % V s A mA A A dB Typ. Max. Unit V V V VO2 VO2 VD2 tTR ISC2 IO2 IADJ IADJ SVR2 Thermal Regulation 2 eN2 VREF VREF Output Noise 1 Temperature Stability Long Term Stability tPULSE = 30ms (Note 5) B= 10Hz to 10KHz (Note 5) Tj = 0 to 125C (Note 5) Tj = 125C, 1000Hrs (Note 5) Note 1: Low duty cycle pulse testing with Kelvin connections are required in order to maintain accurate data Note 2: Dropout Voltage is defined as the minimum differential voltage between V I and VO required to mantain regulation at VO. It is measured when the output voltage drops 1% below its nominal value. Note 3: Transient response is defined with a step change in load from 10mA to 500mA as the time from the load step until the output voltage reaches it's minimum value. Note 4: Minimum load current is defined as the minimum current required at the output in order for the output voltage to maintain regulation. Note 5: Guaranteed by design, not tested in production. 4/12 ST2L01 APPLICATION HINTS EXTERNAL CAPACITORS Like any low-dropout regulator, the ST2L01 requires external capacitors for stability. We suggest to solder both capacitors as close as possible to the relative pins (1, 2 and 5). INPUT CAPACITORS An input capacitor, whose value is at least 1F, is required; the amount of the input capacitance can be increased without limit if a good quality tantalum or aluminum capacitor is used. SMS X7R or Y5V ceramic multilayer capacitors could not ensure stability in any condition because of their variable characteristics with Frequency and Temperature; the use of this capacitor is strictly related to the use of the output capacitors. For more details read the "OUTPUT CAPACITOR SECTION". The input capacitor must be located at a distance of not more than 0.5" from the input pin of the device and returened to a clean analog ground. OUTPUT CAPACITOR The ST2L01 is designed specifically to work with Ceramic and Tantalum capacitros. Special care must be taken when a Ceramic multilayer capacitor is used. Special care must be taken when a Ceramic multilayer capacitor is used. Due to their characteristics they can sometimes have an ESR value lower than the minimum required by the ST2L01 and their relatively large capacitance can change a lot with the ambient temperature. The test results of the ST2L01 stability using multilayer ceramic capacitors show that a minimum value of 1F is needed for the adjustable regulator (set to 2.5V). This value can be increased up to 10F when a tantalum capacitor is used on the input. A higher value CO can have an ESR lower than the accepted minimum. When a ceramic capacitor is used on the input the output capacitance must be in the range from 1F to 2.2F if CI=1F, and from 1F to 4.7F if CI=2.2F. The 3.3V regulator stable with a 470nF capacitor. This value can be increased up to 10F if a tantalum capacitor is used on the input. A higher value CO can have an ESR lower than the accepted minimum. When a ceramic capacitor is used in the input the output capacitance must be in the range from 1F to 2.2F if CI=1F, and from 1F to 4.7F if CI=2.2F. Surface-mountable solid tantalum capacitors offer a good combination of small physical size for the capacitance value and ESR in the range needed by the ST2L01. The test results show good stability for both outputs with values of at least 1F. The value can be increased without limit for even better performance such a transient response and noise. IMPORTANT; The output capacitor must maintain its ESR in the stable region over the full operating temperature to assure stability. Also , capacitor tolerance and variation with temperature must be considered to assure that the minimum amount of capacitance is provided at all times. For this reason, when a ceramic multilayer capacitor is used, the better choise for temperature coefficent is the X7R type, which holds the capacitance within 15% . The output capacitor should be located not more than 0.5" from the output pins of the device and returned to a clean analog ground. ADJUSTABLE REGULATOR The ST2L01 has a 1.25V reference voltage between the output and the adjustable pins (respectevely pin 4 and 2). When a resistor R2 is placed between these two therminals a constant current flows through R2 and down to R1 to set the overall (VO2 to GND) output voltage. Minimum load current is 1mA. IADJ is very small (typically 35A) and constant; in the VO calculation it can be ignored. 5/12 ST2L01 TYPICAL CHARACTERISTICS (CI=1F, CO=1F (X7R)) Figure 1 : Input Current vs Temperature Figure 4 : Load Regulation vs Temperature Figure 2 : Input Current vs Input Voltage Figure 5 : Output Voltage vs Input Voltage Figure 3 : Output Voltage vs Temperature Figure 6 : Dropout Voltage vs Temperature 6/12 ST2L01 Figure 7 : Line Regulation vs Temperature Figure 10 : Dropout Voltage vs Output Current Figure 8 : Supply Voltage Rejection vs Frequency Figure 11 : Reference Voltage vs Temperature Figure 9 : Supply Voltage Rejection vs Temperature Figure 12 : Output Voltage vs Input Voltage 7/12 ST2L01 Figure 13 : Line Regulation vs Temperature Figure 16 : Dropout Voltage vs Temperature Figure 14 : Load Regulation vs Temperature Figure 17 : Dropout Voltage vs Output Current Figure 15 : Supply Voltage Rejection vs Temperature Figure 18 : Supply Voltage Rejection vs Frequency 8/12 ST2L01 Figure 19 : Adjustable pin vs Temperature Figure 22 : Load Transient VI=5V, VO=adjusted to 2.5V, IO=500 to 10mA, CO=1F(X7R) TJ=25C Figure 20 : Minimum Load Current vs Temperature Figure 23 : Load Transient VI=5V, VO=adjusted to 2.5V, IO2=10 to 500mA, CO=1F(X7R) Figure 21 : Load Transient Figure 24 : Load Transient VI=5V, IO1 =500 to 10mA, CO=1F(X7R), TJ=25C VI=5V, IO1 =10 to 500mA, CO=1F(X7R) 9/12 ST2L01 SPAK-5L MECHANICAL DATA DIM. A A2 C C1 D D1 F G G1 H1 H2 H3 L L1 L2 M N V 3 8.89 0.79 0.25 6 3 9.27 8.89 10.41 7.49 9.14 1.04 0.350 0.031 0.010 6 1.02 7.87 0.63 1.69 6.8 5.59 9.52 9.14 10.67 0.365 0.350 0.410 0.295 0.360 0.041 mm. MIN. 1.78 0.03 0.25 0.25 1.27 8.13 0.79 0.040 0.310 0.025 0.067 0.268 0.220 0.375 0.360 0.420 TYP MAX. 2.03 0.13 MIN. 0.070 0.001 0.010 0.010 0.050 0.320 0.031 inch TYP. MAX. 0.080 0.005 PO13F1/B 10/12 ST2L01 PPAK MECHANICAL DATA mm. DIM. MIN. A A1 A2 B B2 C C2 D E G G1 H L2 L4 0.6 2.2 0.9 0.03 0.4 5.2 0.45 0.48 6 6.4 4.9 2.38 9.35 0.8 1 0.023 TYP MAX. 2.4 1.1 0.23 0.6 5.4 0.6 0.6 6.2 6.6 5.25 2.7 10.1 MIN. 0.086 0.035 0.001 0.015 0.204 0.017 0.019 0.236 0.252 0.193 0.093 0.368 0.031 0.039 TYP. MAX. 0.094 0.043 0.009 0.023 0.212 0.023 0.023 0.244 0.260 0.206 0.106 0.397 inch 0078180-B 11/12 ST2L01 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. (c) The ST logo is a registered trademark of STMicroelectronics (c) 2002 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. (c) http://www.st.com 12/12 |
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