ACE500E Fast Transient Response LDO with Adjustable Output Voltage Description ACE500E is a 500mA low noise and fast transient response liner regulator with adjustable output voltage and ultra low dropout voltage. Its output voltage is programmed by a resistor divider, and can be as low as 0.8V, which satisfies the most advanced ICs which may require supply voltage to be 0.9V – 1.2V. ACE500E is consists of a precise voltage reference, an error amplifier, a compensation network and a low ON-resistance power P-MOSFET. It also integrates many protection circuitry, like current limit and over-temperature protection module. Features • • • • • • • • • 500mA output current Adjustable output voltage Minimum output voltage as low as 0.8V Ultra low dropout voltage 370mV @ 500mA Low quiescent current 40uA <1uA shutdown current Short-circuit protection Over-temperature protection Accuracy ±1%；±2% Applications Cellphones Camera modules Medical Instruments Battery powered devices Absolute Maximum Ratings Parameter Symbol VIN Voltage -0.3V~8V All Other Pin Voltage VIN-0.3V~VIN0.3 VIN to GND Current Internally limited Operating Temperature Range -40~85℃ Storage Temperature Range -55℃~150℃ θJA 190 ℃/W Thermal Resistance VER 1.2 1 ACE500E Fast Transient Response LDO with Adjustable Output Voltage TYPICAL APPLICATION Packaging Type SOT-23-5 1 5 2 6 3 Pin # Name Description 1 VIN Input voltage pin, connect a 1uF capacitor to GND 2 GND Ground 3 EN Enable pin. Pull this pin “high” to turn on the chip and “low” to turn off 4 FB 5 VOUT Feedback pin. Feedback voltage is set to be 0.8V. Output voltage is programmed by a resistor divider from Vout thru FB to GND, and by the equation 0.8V x R1+R2/ R2= Vout Output voltage pin, connect a 2.2uF capacitor to GND Ordering information ACE500E X XX + H Halogen - free Pb - free BN：SOT-23-5 A：± 1% B：± 2% VER 1.2 2 ACE500E Fast Transient Response LDO with Adjustable Output Voltage Electrical Characteristics (VIN = 5V, unless otherwise specified. Typical values are at TA = 25ºC.) Parameter Conditions INPUT Range Min Typ 2.5 Quiescent Current (Iq) Vfb=1V Feedback Voltage (Vfb) Max Units 6.0 V 40 0.775 0.8 uA 0.825 mV Iout=100mA 75 Iout=300mA 225 Iout=500mA 370 Line Regulation 2.5V < Vin <5.5 0.075 %/V Load Regulation 0mA < Iout < 500mA 0.6 %/A Maximum Output Current (Iout_Max) Vin – Vout = 1V 0.9 Dropout Voltage (Vdrop) Current Limit 1.05 1.05 EN logic “high” Voltage Voltage to turn on the chip EN logic “low” Voltage Voltage to turn off the chip Thermal Protection Ripple Rejection mV F=100Hz, Ripple=0.5Vp-p VIN= Set VOUT+1V A A 1.5 V 0.5 V 150 ℃ 65 dB Typical Performance Characteristics (Typical values are at TA = 25℃ unless otherwise specified.) Dropout Voltage Vin=5V Dropout Voltage Vin=3.5V VER 1.2 3 ACE500E Fast Transient Response LDO with Adjustable Output Voltage Typical Performance Characteristics (Typical values are at TA = 25℃ unless otherwise specified.) Dropout Voltage Vin=2V Line Regulation Vout=3.3V Line Regulation Vout=0.8V Quiescent current Vout=3.3V Load Regulation Vout=3.3V Load Regulation Vout=0.8V VER 1.2 4 ACE500E Fast Transient Response LDO with Adjustable Output Voltage Load Transient Response at Iout 1 – 500mA, Vout=3.3V Startup Waveform at Iout=200mA, Vout=3.3V VER 1.2 5 ACE500E Fast Transient Response LDO with Adjustable Output Voltage Packing Information SOT-23-5 VER 1.2 6 ACE500E Fast Transient Response LDO with Adjustable Output Voltage Notes ACE does not assume any responsibility for use as critical components in life support devices or systems without the express written approval of the president and general counsel of ACE Electronics Co., LTD. As sued herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and shoes failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. ACE Technology Co., LTD. http://www.ace-ele.com/ VER 1.2 7