AMS1117S-5.0

AMS1117S-3.3 1A LOW DROPOUT VOLTAGE REGULATOR Description Features The AMS1117 is a series of low dropout voltage  Low Dropout Voltage. regulators which can provide up to 1A of output  Load regulation: 0.5% Max. current. The AMS1117 is available in six fixed  Optimized for Low Voltage voltage, 1.2, 1.5, 1.8, 2.5, 3.3 and 5.0V. Additionally  On-chip thermal limiting. it is also available in adjustable version. On chip  Maximum Input Voltage : 30V precision trimming adjusts the reference/ output  Adjustable Output Voltage or Fixed 1.2V, voltage to within ± 2%. On-chip thermal limiting 1.5V, 1.8V, 2.5V, 3.3V,5V provides protection against any combination of MI JS  overload and ambient temperatures that would Standard SOT-223,TO-252 ,SOT89 Packages Applications The AMS1117 series is available in SOT-223, TO-  O CR create excessive junction temperatures. Post Regulator for switching DC/DC Converter 252, SOT89 packages. A minimum of 10uF  High Efficiency Linear Regulator improve the transient response and stability.        Battery Chargers Block Diagram  PC Add on Card  Motherboard clock supplies  LCD Monitor r  Set-top Box r to uc nd co   mi Se tantalum capacitor is required at the output to             www.jsmsemi.com 第１／９页 AMS1117S-3.3 1A LOW DROPOUT VOLTAGE REGULATOR Pin Description MI JS Absolute Maximum Ratings Symbol IOUT TJ Input Voltage Description Max   Units 30 O CR VIN   DC Output Current Operating Junction Temperature Range V PD/(VIN-VOUT) mA -40 to 125 ℃ 150 ℃/W Thermal Resistance (SOT-223) θ JA Thermal Resistance (TO-252) 125 ℃/W θ JA Thermal Resistance (SOT89) 225 ℃/W PD Maximum Power Dissipation (SOT-223) 600 mW PD Maximum Power Dissipation (TO-252) 900 mW PD Maximum Power Dissipation (SOT89) 400 mW r to uc nd co mi Se θ JA www.jsmsemi.com 第２／９页 AMS1117S-3.3 1A LOW DROPOUT VOLTAGE REGULATOR Electrical Characteristics (Vin = 11μF.   www.jsmsemi.com 第５／９页 AMS1117S-3.3 1A LOW DROPOUT VOLTAGE REGULATOR Load Regulation When the adjustable regulator is used (Fig.2), the best load regulation is accomplished when the top of the resistor divider (R1) is connected directly to the output pin of the AMS1117. When so connected, RP is not multiplied by the divider ratio. For Fixed output version, the top of R1 is internally connected to the output and ground pins can be connected to low side of the load Figure 2. Best Load Regulation Using Adjustable Output Regulator O CR MI JS mi Se Thermal Protection AMS1117 has thermal protection which limits junction temperature to 150 ℃ . However, device functionality is only guaranteed to a maximum junction temperature of +125℃. The power dissipation and junction temperature for AMS1117 in DPAK package are given by nd co PD = (VIN – VOUT) * Iout TJUNCTION = TAMBIENT + (PD * θ JA) Note: TJUNCTION must not exceed 125℃  uc Thermal Consideration The AMS1117 series contain thermal limiting circuitry designed to protect itself from over- r to temperature conditions. Even for normal load conditions, maximum junction temperature ratings must not be exceeded. As mention in thermal protection section, we need to consider all sources of thermal resistance between junction and ambient. It includes junction-to case, case-to-heat-sink interface, and heat sink thermal resistance itself. Junction-to-case thermal resistance is specified from the IC junction to the bottom of the case directly below the die. Proper mounting is required to ensure the best possible thermal flow from this area of the package to the heat sink. The case of all devices in this series is electrically connected to the output. Therefore, if the case of the device must be electrically isolated, a thermally conductive spacer is recomme   www.jsmsemi.com 第６／９页 AMS1117S-3.3 1A LOW DROPOUT VOLTAGE REGULATOR PACKAGE DESCRIPTION SOT-223 PACKAGE OUTLINE DIMENSIONS O CR MI JS Min     Max Min Max 1.800 0.060 0.071 0.130 0.001 0.005 0.059 0.067 0.026 0.033 0.009 0.014 0.254 0.270 1.520   A1 0.020   A2 1.500   1.700 b 0.660   0.840 c 0.230   0.350 D 6.450   6.850 D1 2.900   3.000 0.114 0.122 E 3.450   3.850 0.136 0.152 E1 6.830   7.070 0.269 0.278   r to 2.300（BSC） uc   nd co A e   Dimensions ln lnches mi Se Dimensions ln Millimeters Symbol   0.091(BSC) e1 4.500   4.700 0.177 0.185 L 0.900   1.150 0.035 0.045 θ 0° 10° www.jsmsemi.com 0° 10 第７／９页 AMS1117S-3.3 1A LOW DROPOUT VOLTAGE REGULATOR TO-252-2L PACKAGE OUTLINE DIMENSIONS O CR MI JS Min   Max Min Max 2.400 0.087 0.094 0.127 0.000 0.005 2.200 A1 0.000   B 1.200   1.650 0.047 0.065 b 0.500   0.810 0.020 0.032 b1 0.700   0.900 0.028 0.035 c 0.460   0.580 0.018 0.023 c1 0.430   0.580 0.014 0.023 D 6.350   6.700 0.250 0.264 D1 5.200   5.400 0.205 0.213 E 5.400   6.200 0.213 0.244   r to 2.300TYP uc   nd co A     e   0.0901TYP e1 4.500   4.700 0.177 0.185 L1 9.500   9.900 0.374 0.390 L2 0.950   1.600 0.037 0.063 L3 0.700   1.100 0.028 0.043 L4 2.550   2.900 0.100 0.114 V   Dimensions ln lnches mi Se Dimensions ln Millimeters Symbol   3.80REF   www.jsmsemi.com   0.150REF 第８／９页 AMS1117S-3.3 1A LOW DROPOUT VOLTAGE REGULATOR SOT89 PACKAGE OUTLINE DIMENSIONS MI JS   Max Min Max 1.400   1.600 0.055 0.063 b 0.350   0.520 0.013 0.197 b1 0.400   0.580 0.016 0.023 c 0.350   0.450 0.014 0.018 D 4.400   4.600 0.173 0.181 D1 1.550   1.750 0.061 0.069 E 2.350   2.600 0.091 0.102 E1 3.720   4.530 0.146 0.178 A e   1.500TYP     e1   3.000TYP     0.820   1.100 www.jsmsemi.com 0.060TYP 0.118TYP r to L uc nd co mi Se Min     Dimensions ln lnches O CR Dimensions ln Millimeters Symbol 0.032 0.047 第９／９页