S78Dxxx Low Dropout Voltage Regulator (1.0A Series) Semiconductor http:// www.auk.co.kr Description The S78Dxxx is an efficient linear low dropout voltage regulator for various electronic equipment. It is designed to provide very low dropout voltage, and better than 2.4% output voltage accuracy. And the S78Dxxx has various key features such as current limiting, SOT-223 over temperature shut-down, over voltage protection, and low noise performance with an low noise option. Furthermore, it is available in adjustable or fixed output voltages in TO-252-3L SOT-223, TO-252-3L and TO-220F-3L packages. Application ◈ Consumer and personal electronics TO-220F-3L ◈ SMPS post-regulator / dc-to-dc modules ORDERING INFORMATION ◈ High-efficiency linear power supplies Product Marking Package Features and Benefits S78DxxQ S78DxxQ SOT-223 ◈ Low Dropout Voltage for 1.0A Output : [ Max. 500mV]. S78DxxD S78DxxD TO-252-3L S78DxxPI S78DxxPI TO-220F-3L ◈ Built in Thermal shut down circuit. ◈ Built in OVP, CLP circuit. ◈ Low Quiescent Current : [Typ. 2.0mA] ▲ Marking Detail Information [ SOT-223 PKG Marking ] S78Dxxx (①) GYWW(②) ◈ Ultra High level of ESD [ Built in ESD Protection Cell ] MM : 400V↑ / HBM 3KV↑ Equivalent Circuit VIN VOUT ① Device Code ② Grade & Year & Week Code Bias [ TO-220F-3L & TO-253-3L PKG Marking ] AUK(①) G△YWW (②) VREF S78Dxxx (③) ¯ + TSD, OVP, CLP ① AUK Logo GND ② Grade & M Code & Year & Week Code ③ Device Code KSD-I0T007-001 October, 2010 REV. 01 1 S78Dxxx ◈ Pin Configuration 4 4 1 2 1 3 2 1 3 2 3 TO-220F-3L SOT-223 TO-252-3L 1: VIN 1: VIN 1: VIN 2: GND 2: GND 2: GND 3: VOUT 3: VOUT 3: VOUT 4: GND 4: GND ◈ Product Line-up Product Name VOUT Operating Temperature Package S78D18Q 1.8V -30~125℃ SOT-223 S78D25Q 2.5V -30~125℃ SOT-223 S78D33Q 3.3V -30~125℃ SOT-223 S78D50Q 5.0V -30~125℃ SOT-223 S78D18D 1.8V -30~125℃ TO-252-3L S78D25D 2.5V -30~125℃ TO-252-3L S78D33D 3.3V -30~125℃ TO-252-3L S78D50D 5.0V -30~125℃ TO-252-3L S78D18PI 1.8V -30~125℃ TO-220F-3L S78D25PI 2.5V -30~125℃ TO-220F-3L S78D33PI 3.3V -30~125℃ TO-220F-3L S78D50PI 5.0V -30~125℃ TO-220F-3L KSD-I0T007-001 October, 2010 REV. 01 2 S78Dxxx ◈ Absolute Maximum Ratings ( Ta = 25℃ ) Parameter Symbol Limits Unit Input Voltage VIN 23.0 V SOT-223 TO-252-3L Power Dissipation 1.0(Note1) Pd TO-220F-3L 1.3(Note2) W 2.0(Note2) Junction Temperature TJ 150 ℃ Operate Temperature Range Topr -30 ~ +125 ℃ Storage Temperature Range Tstg -55 ~ +150 ℃ 2 Note 1 : Mount on a glass epoxy circuit board of 36x18mm pad dimension of 50mm Note 2 : No Heat-Sink Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the device outside of its operating ratings. The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(max) , the junction-to-ambient thermal resistance, θJA, and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using: PD(max) = (TJ(max) – TA) ÷ θJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. ◈ Guaranteed Operating Conditions ( Ta = 25℃ ) Parameter Symbol Limits Unit Supply Input Voltage VIN Vo+0.5~20 V Output Current IOUT 1.0 A KSD-I0T007-001 October, 2010 REV. 01 3 S78Dxxx ◈ Electrical characteristics ( VIN=VOUT+1.0V, CIN = 0.33uF, COUT = 47 uF, IOUT = 5mA, TJ=25℃ ; unless noted ) NO Characteristics Symbol Specification Condition MIN. TYP. MAX. 1.764 1.800 1.836 V 2.450 2.500 2.550 V S78D33x 3.234 3.300 3.366 V S78D50x 4.900 5.000 5.100 V S78D18x S78D25x 1 Unit Output Voltage VOUT Variation from nominal VOUT 2 Line Regulation VLINE VIN=VOUT+1V to 12V, IOUT=5mA - 0.05 0.5 % 3 Load Regulation VLOAD VIN=VOUT+1V, IOUT=5mA to 1A - 0.1 1.0 % 4 Quiescent Current IQC VIN=VOUT+1V to 20V, IOUT=0mA - 2.0 5.0 mA 5 Ripple Rejection R·R IOUT=50mA, f=120Hz 55.0 65.0 - dB 6 Output Noise Voltage VIN=VOUT+1V, IOUT=50mA, 10Hz ≤ f ≤ 100kHz - 100 - uVrms 7 Dropout Voltage VDROP IOUT=1.0A - - 0.5 V 8 Current Limit ILIMIT VIN=VOUT+1V 1100 1300 - mA VNO Typical Application S78Dxxx VIN CIN + CO RL VOUT – 1) CIN should be required if regulators are located far from power supply filter 2) CO improves output stability and transient response ( CO ≥ 47uF ) KSD-I0T007-001 October, 2010 REV. 01 4 S78Dxxx Fig2. VOUT – TJ 2.80 2.60 2.60 2.55 Output Voltage VOUT [mA] Quiescent Current IQC [mA] Fig1. IQC – TJ 2.40 2.20 2.00 1.80 1.60 2.50 2.45 2.40 2.35 2.30 2.25 1.40 -30 0 30 60 90 120 -30 150 0 30 60 90 120 Junction Temperature [℃] Junction Temperature [℃] Fig3. VOUT – VIN Fig4. VOUT – TJ 3.5 3.5 VOUT = 2.5V 3.0 Output Voltage VOUT [V] Output Voltage VOUT [V] VOUT = 2.5V 2.5 2.0 1.5 1.0 0.5 0.0 150 VOUT = 2.5V 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0 5 10 15 20 25 30 Input Voltage VIN [V] [ Over-Voltage Protection ] KSD-I0T007-001 October, 2010 REV. 01 25 50 75 100 125 150 175 Junction Temperature [℃] [ Thermal Shut-down Protection ] 5 S78Dxxx Fig5. VOUT – IOUT 80 VOUT = 2.5V 2.60 Ripple Rejection RR [dB] Output Voltage VOUT [V] 2.80 Fig6. VOUT – TJ 2.40 2.50 2.00 1.80 1.60 f = 120Hz / IO = 50mA 70 60 50 40 30 20 10 1.40 0 0.3 0.6 0.9 1.2 1.5 2.0 Output Current IOUT [A] [ Current Limit Characteristics ] 0.1 1.0 10 100 Input Ripple Frequency [ KHz ] Fig7. VDROP – TJ Drop-out Voltage VDROP [mV] 700 VOUT = 2.5V 600 500 IO = 1.0A 400 300 IO = 0.5A 200 100 0.00 -30 0 30 60 90 120 150 Junction Temperature [℃] KSD-I0T007-001 October, 2010 REV. 01 6 S78Dxxx -20 Cin=1.0uF, Cout=47uF Iout=10mA, TA=25℃ 0.8 1.2 1.6 3.5 20 0 -20 Cin=1.0uF, Cout=47uF Iout=10mA, TA=25℃ 0 0.4 0.8 1.2 1.6 Time [mS] Fig.10 Load Transient Response Fig.11 Load Transient Response 0 -0.1 1.0 0 Cin=1.0uF, Cout=47uF, Vin=Vout+1V Preload=200mA, TA=25℃ 40 80 120 160 200 Deviation [V] Time [mS] 0.1 0 5.5 2.0 Load Current [A] Deviation [V] Load Current [A] 0.4 Voltage [V] 0 Deviation [mV] 20 Input 3.5 Output Voltage Voltage [V] Deviation [mV] 4.5 0 Output Voltage Fig.9 Line Transient Response Output Voltage Input Output Voltage Fig.8 Line Transient Response Time [µS] 0.1 0 -0.1 1.0 0 Cin=1.0uF, Cout=47uF, Vin=Vout+3V Preload=200mA, TA=25℃ 0 40 80 120 160 200 Time [µS] KSD-I0T007-001 October, 2010 REV. 01 2.0 7 S78Dxxx ◈ SOT-223 Outline Dimension (Unit : mm) ※ Recommend PCB solder land KSD-I0T007-001 October, 2010 REV. 01 [Unit: mm] 8 S78Dxxx ◈ TO-252-3L Outline Dimension (Unit : mm) ※ Recommend PCB solder land [Unit: mm] 2.50 7.00 7.00 1.50 4.60 KSD-I0T007-001 October, 2010 REV. 01 9 S78Dxxx ◈ TO-220F-3L Outline Dimension (Unit : mm) KSD-I0T007-001 October, 2010 REV. 01 10 S78Dxxx The AUK Corp. products are intended for the use as components in general electronic equipment (Office and communication equipment, measuring equipment, home appliance, etc.). Please make sure that you consult with us before you use these AUK Corp. products in equipments which require high quality and / or reliability, and in equipments which could have major impact to the welfare of human life(atomic energy control, airplane, spaceship, transportation, combustion control, all types of safety device, etc.). AUK Corp. cannot accept liability to any damage which may occur in case these AUK Corp. products were used in the mentioned equipments without prior consultation with AUK Corp.. Specifications mentioned in this publication are subject to change without notice. KSD-I0T007-001 October, 2010 REV. 01 11