Advanced Power Electronics Corp. Technology Licensed from International Rectifier APU1205 300mA ULTRA LOW DROPOUT POSITIVE ADJUSTABLE AND FIXED REGULATORS DESCRIPTION FEATURES The APU1205 device is an efficient linear voltage regulator with better than 2% initial voltage accuracy, very low dropout voltage and very low ground current designed especially for hand held, battery powered applications. Other features of the device are: TTL compatible enable/shutdown control input, current limiting and thermal shutdown. The APU1205 is available in fixed and adjustable output voltage versions in a small SOT-23 5-Pin package. Stable with 2.2uF Ceramic Capacitor 2% Voltage Reference Accuracy Only 270mV Dropout at 300mA and 170mV Dropout at 150mA 5uA Quiescent Current in Shutdown Current Limit and Thermal Shutdown Logic Input Enable Pin RoHS Compliant & Halogen-Free SOT-23-5L & SOT-23-5LR Package APPLICATIONS Laptop, Notebook & Palmtop computers Battery Powered Equipments PCMCIA Vcc & Vpp Regulator Consumer Electronics High Efficiency Linear Power Supplies TYPICAL APPLICATION VIN VIN C1 2.2uF VOUT R1 + + GND C2 2.2uF VOUT Vo= 1.25 x (1+R1/R2) R2 Enable EN ADJ Figure 1 - Typical application of the APU1205 adjustable voltage regulator. VIN=3.3V VIN C1 2.2uF VOUT=2.5V VOUT + Enable + GND EN CBYP + C2 2.2uF C3 1000pF Figure 2 - Typical application of the APU1205-25 fixed voltage regulator. PACKAGE / ORDERING INFORMATION APU1205X-XX-HF Package Y5 : SOT-23-5L Y5R : SOT-23-5LR Halogen Free Output Voltage Blank : ADJ 18 : 1.8V 25 : 2.5V 33 : 3.3V TOP VIEW TOP VIEW EN GND VIN EN GND VIN 3 2 1 3 2 1 SOT-23-5L SOT-23-5L 4 4 5 ADJ VOUT ADJ Data and specifications subject to change without notice 5 CBYP VOUT Fixed TOP VIEW VIN GND 3 2 EN 1 SOT-23-5LR 4 5 VOUT ADJ ADJ TOP VIEW VIN GND 3 2 EN 1 SOT-23-5LR 4 VOUT 5 CBYP Fixed 1 201206088 Advanced Power Electronics Corp. APU1205 ABSOLUTE MAXIMUM RATINGS (TA=25oC, unless otherwise specified.) Input Voltage (VIN) ----------------------------------------- 10V Enable Input Voltage (VEN) ------------------------------ 10V Storage Temperature Range (T ST) -------------------- -65 to 150oC Operating Junction Temperature Range (T J) ------- 0 to 150oC Thermal Resistance Junction to Ambient (R thja) o 256 C/W ELECTRICAL SPECIFICATIONS Unless otherwise specified, these specifications apply over CIN=CO=2.2uF, IO=100uA, VIN(MIN)=2.5V(Adjustable devices), VIN=VO + 1V(for fixed voltage devices), V OUT=VFB(for adjustable version only), C BYP=470pF (for fixed voltage devices), VEN=2V and TA=25oC. Typical values refer to TA=25oC. Low duty cycle pulse testing is used which keeps junction and case temperatures equal to the ambient temperature. Parameter Reference Voltage (See Table 1 for typical values) Line Regulation Load Regulation (Note 1) Dropout Voltage (Note 2) Ground Current (Note 3) Ground Current-SD Activated Adjust Pin Current Current Limit SYM TEST CONDITION MIN TYP MAX UNITS -2 - 2 % VO + 1V<VIN<10V - 0.005 - %/V 1mA<IO<100mA - 0.8 - % 100mA<IO<300mA - 0.1 - % IO=100uA - 10 50 IO=50mA - 85 110 IO=150mA - 170 220 IO=300mA - 270 350 VEN=2V, IO=100uA - 120 160 VEN=2V, IO=50mA - 460 600 VEN=2V, IO=150mA - 2200 2900 VEN=2V, IO=300mA - 7200 9500 Vo VI VL VDROP IQ IQ(SD) mV uA VEN =0V to 0.8V or Open - 5 - uA IADJ VIN=2.5V, VO=VADJ - 0.1 - uA ICL VO=0V 320 420 - mA VIN=10V, IO=150mA, 10ms Pulse - 0.05 - %/W Enable Pin Input LO Current VEN(L) =0V to 0.8V - 0.01 - Enable Pin Input HI Current VEN(H)=2V to VIN - 20 - Thermal Regulation VP uA Enable Pin Input LO Voltage VEN(L) Regulator OFF - - 0.8 V Enable Pin Input HI Voltage VEN(H) Regulator ON 2 - - V Note 1: Low duty cycle pulse testing with Kelvin connections is required in order to maintain accurate data. Note 2: Dropout voltage is defined as the minimum differential voltage between VIN and VOUT required to maintain regulation at VOUT. It is measured when the output voltage drops 1% below its nominal value. Note 3: Ground current is the regulator quiescent current plus the pass transistor current. The total current from the supply is the sum of the load current plus the ground pin current. 2 Advanced Power Electronics Corp. APU1205 PIN DESCRIPTIONS PIN SYMBOL PIN DESCRIPTION The input pin of the regulator. Typically a large storage capacitor is connected from this pin to ground to insure that the input voltage does not sag below the minimum drop out voltage during the load transient response. This pin must always be higher VIN than VOUT by at least the amount of the dropout voltage and some margin in order for the device to regulate properly. Ground pin. This pin must be connected to the lowest potential in the system and GND all other pins must be at higher potential with respect to this pin. Enable pin. A low signal or left open on this pin shuts down the output. This pin EN must be tied HI or to VIN for normal operation. A resistor divider from this pin to the VOUT pin and ground sets the output voltage. To minimize the error due to the error amplifier, select the values of the resistor Adj (Adjustable only) dividers to be less than 10K . A 470 to 1000pF bypass capacitor connected to this pin reduces the output noise. CBYP (Fixed only) The output of the regulator. A minimum of 2.2uF with max ESR of 1 capacitor VOUT Part Number must be connected from this pin to ground to insure stability. The output voltage of the adjustable device can be set using: VO= 1.25 x (1+R1/R2) Where: R1 = Resistor connected from output to the Adj pin R2 = Resistor connected from Adj pin to Gnd Output Voltage APU1205 1.25V APU1205-18 1.8V APU1205-25 2.5V APU1205-33 3.3V Table 1- Nominal output voltage vs. part number. BLOCK DIAGRAM VIN 1 ADJ 4 5 + - VOUT Thermal Shutdown + GND 2 3 EN Figure 3 - APU1205Y5 Adjustable output block diagram. 3 Advanced Power Electronics Corp. APU1205 BLOCK DIAGRAM VIN 1 5 VOUT + CBYP - 4 + Thermal Shutdown GND 2 3 EN Figure 4 - APU1205-18, APU1205-25 and APU1205-33 Fixed output block diagram. 4 Advanced Power Electronics Corp. APU1205 MARKING INFORMATION SOT-23-5L Part Number : RB RB&SS Output Voltage : Date Code SS:2004,2008,2012... SS:2003,2007,2011... SS:2002,2006,2010... SS:2001,2005,2009... Output Voltage VOUT Code ADJ Blank 1.8V A 2.5V B 3.3V E Output Voltage VOUT Code ADJ Blank 1.8V A 2.5V B 3.3V E SOT-23-5LR Part Number : Rb Rb&SS Output Voltage : Date Code SS:2004,2008,2012... SS:2003,2007,2011... SS:2002,2006,2010... SS:2001,2005,2009... 5