STP1117SXX SECOS | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 6
Technical content
1.0A Low Dropout Positive Adjustable or Fixed-Mode Regulator 27-Jun-2017 Rev. B Page 1 of 6 http://www.SeCoSGmbH.com/ Any changes of specification will not be informed individually. ADJ (Gnd) [[ [[ Vout \\\\ \\\\ Vin ]] ]] xx:Vout A: ADJ 25: 2.5V 12: 1.2V 33: 3.3V 18: 1.8V The last letter(s) of Part No. denote the Output Voltage RoHS Compliant Product A suffix of “-C” specifies halogen free
DESCRIPTION
The STP1117Sxx series of positive adjustable and fixed regulators are designed to provide 1A with high efficiency. All internal circuitry is designed to operate down to 1.4V input to output differential. On-chip trimming adjusts the reference voltage to 1%. Current limit the typical value of 1.5A allows to minimizing the stress on both the regulator and the power source circuitry under overload conditions.
FEATURES
/circle6 Adjustable or Fixed Output 1.2V,1.8V,2.5V,3.3V /circle6 Output Current of 1A /circle6 Low Dropout, 1.2 V typ. at 1A Output Current /circle6 0.04% Line Regulation /circle6 0.2 % Load Regulation /circle6 100% Thermal Limit Burn-In /circle6 Fast Transient Response
APPLICATIONS
/circle6 High Efficiency Linear Regulators /circle6 Post Regulators for Switching Supplies /circle6 Adjustable Power Supply MARKING
PACKAGE INFORMATION
TYPICAL APPLICATION CIRCUIT Part Number Marking STP1117SA 1117SA STP1117S12 1117S12 STP1117S18 1117S18 STP1117S25 1117S25 STP1117S33 1117S33 SOT-223 Top View A M B D LK F G H J E C A 5.90 6.70 G - 0.18 B 6.70 7.30 H 2.00 REF. C 3.30 3.80 J 0.20 0.40 D 1.40 1.90 K 1.10 REF. E 4.45 4.75 L 2.30 REF. F 0.60 0.85 M 2.80 3.20
1.0A Low Dropout Positive Adjustable or Fixed-Mode Regulator 27-Jun-2017 Rev. B Page 2 of 6 http://www.SeCoSGmbH.com/ Any changes of specification will not be informed individually. ABOSLUTE MAXIMUM RATINGS Parameter Symbol Value Unit Input Voltage VI 20 V Minimum ESD Rating (HBM) V ESD 3 kV Lead Temperature (Soldering, 10sec.) T L 300 ° C Thermal Resistance Ambient Ambient R θJC 15 ° C/W Operating Junction Temperature Range T J -40~+125 ° C Storage Temperature Range T stg -65~+150 ° C Note: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. FUNCTIONAL BLOCK DIAGRAM
1.0A Low Dropout Positive Adjustable or Fixed-Mode Regulator 27-Jun-2017 Rev. B Page 3 of 6 http://www.SeCoSGmbH.com/ Any changes of specification will not be informed individually.
ELECTRICAL CHARACTERISTICS
(ILOAD =0mA, T J=25° C unless otherwise specified ) Parameter Symbol Device Min. Typ. Max Unit Test conditions Operating Voltage 4 VIN - - 16 V 1.232 1.250 1.268 ILOAD =10mA, V IN =5V Reference Voltage 1 VIROC Adj 1.225 1.250 1.275 V ILOAD =10mA to1A, 1.5V ≤ VIN -VOUT ≤ 10V 4 -1.5 - 1.5 VIN =V OUT =1.5V, Variator from nominal V OUT All fixed version -2 - 2 Output Voltage 1 VO VOUT =1.2V -3 - 2 % 1.5V ≤ VIN -VOUT ≤ 10V, ILOAD =0mA to 1A, Variator from nominal V OUT Output Voltage Accuracy @Wafer Testing VO All -0.6 0 0.6 % VIN =V OUT =1.5V, I LOAD =10mA Line Regulation LNR All - 0.04 0.238 % ILOAD =10mA, 1.5V ≤ VIN -VOUT ≤ 10V 4 Load Regulation 1 LDR All - 0.2 0.25 % VIN =V OUT =1.5V, I LOAD =10mA to1A 4 Minimum Load Current IL adj - 2 7 mA VIN =5V, V ADJ =0V 4 Ground Pin Current All fixed version - 35 10 mA VIN =V OUT =1.5V, I LOAD =10mA to1A 4 Adjust Pin Current Adj - 35 60 uA ILOAD =10mA, 1.5V ≤ VIN -VOUT ≤ 10V 4 Current Limit All 1 1.5 2 A VIN -VOUT =1.5V 4 Ripple Rejection 2 RR All 60 - - dB VIN -VOUT =2.5V, I LOAD =1A Dropout Voltage 1.3 VD All - 1.2 1.4 V ILOAD =1A 4 Temperature Coefficient All - - 0.015 %/° C VIN -VOUT =1.5V, I LOAD =10mA 4 Notes: 1. Low duty pulse testing with Kelvin connections required. 2. 120Hz input ripple (C ADJ for ADJ = 25 µF). 3. △VOUT , △VREF =1% 4. The specifications which apply over the full temperature range: −40° C ≤ TJ ≤ 125° C.
1.0A Low Dropout Positive Adjustable or Fixed-Mode Regulator 27-Jun-2017 Rev. B Page 4 of 6 http://www.SeCoSGmbH.com/ Any changes of specification will not be informed individually. TYPICAL CHARACTERISTICS
1.0A Low Dropout Positive Adjustable or Fixed-Mode Regulator 27-Jun-2017 Rev. B Page 5 of 6 http://www.SeCoSGmbH.com/ Any changes of specification will not be informed individually. TYPICAL CHARACTERISTICS
1.0A Low Dropout Positive Adjustable or Fixed-Mode Regulator 27-Jun-2017 Rev. B Page 6 of 6 http://www.SeCoSGmbH.com/ Any changes of specification will not be informed individually.
APPLICATION INFORMATION
The STP1117S develops a 1.25V reference Voltage Between the output and the adjust terminal. By placing A resistor between these two terminals, a constant current Is cause to flow through R1 and down through R2 to set the Overall output voltage. Normally, this current is chosen to be the specified minimum load current of 10mA . For fixed voltage devices R1 and R2 are included in the device. Load Regulation When the adjustable regulator is used, load regulation will be limited by the resistance of the wire connecting the regulator to the load. The data sheet specification foe load regulation is measured at the output pin of the device. Best load regulation is obtained when the top of the resistor divider (R1) is tied directly to the output pin of the device not to the load. For fixed voltage, devices the top of R1 is internally connected to the output, and the ground pin can be connected to low side of the load. If R1 is connected to the load, R P is multiplied by the divider ratio, the effective resistance between the regulator and the load would be: R P × (1 + R2/R1), R P = Parasitic Line Resistance Input Capacitor An input capacitor of 10 µF or greater is recommended. Tantalum or aluminum electrolytic capacitors can be used for bypassing. Larger Values will improve ripple rejection by bypassing the input to the regulator. Output Capacitor The STP1117S requires an output capacitor to maintain stability and improve transient response. Proper capacitor selection is important to ensure proper operation. The STP1117S output capacitor selection is dependent upon the ESR (equivalent series resistance) of the output capacitor to maintain stability. When the output capacitor is 10 µF or greater, the output capacitor should have an ESR less than 1 Ω. This will improve transient response as well as promote stability. A low-ESR solid tantalum capacitor works extremely well and provides good transient response and stability over temperature. Aluminum electrolytics can also be used, as long as the ESR of the capacitor is <1 Ω. The value of the output capacitor can be increased without limit. Higher capacitance values help to improve transient response and ripple rejection and reduce output noise. Ripple Rejection The curves for Ripple Rejection were generated using an adjustable device with the adjust pin bypassed. With a 25 µF bypassing capacitor, 75dB ripple rejection is obtainable at any output level. The impedance of the adjust pin capacitor, at the ripple frequency, should be <R1. R1 is normally in the range of 100W to 200W. The size of the required adjust pin capacitor is the function of the input ripple frequency. At 120Hz, with R1=100 Ω,the adjust pin capacitor should be 13 µF. For fixed voltage devices and adjustable devices without an adjust pin capacitor, the output ripple will increase as the ratio of the output voltage to the reference voltage (V OUT /V REF ).