SQ2153 CMOS Positive Voltage Regulator Elektronische Bauelemente RoHS Compliant Product Description The SQ2153 series of positive,linear regulators feature low quiescent current (30µA typ.) with low dropout voltage, making them ideal for battery applications. These rugged devices have both Thermal Shutdown, and Current Fold-back to prevent device failure under the "Worst" of operating conditions. In applications requiring a low noise, regulated supply, place a 1000pF capacitor between Bypass and Ground. The SQ2153 is stable with an output capacitance of 2.2µF or greater. Features * High Accurate ± 1.5% REF. * Over-Temperature Shutdown A B C D E F * Factory Pre-set Output Voltage * Very Low Dropout Voltage * Noise Reduction Bypass Capacitor * Short Circuit Current Fold-back * Guaranteed 300mA output Millimeter Min. Max. 2.70 3.10 2.60 3.00 1.40 1.80 0.30 0.55 0 0.10 0° 10° REF. G H I J K L Dimensions Millimeter 1.90 REF. 1.20 REF. 0.12 REF. 0.37 REF. 0.60 REF. 0.95 REF. * Current Limiting * Power-Saving Shutdown Mode Applications * PC Peripherals * Wireless Devices * Portable Electronics * Battery Powered Widgets Functional Block Diagram * Electronic Scales * Instrumentation * Cordless Phones Typical Application Circuit IN IN SQ2153 BYP + C1 C2 1uF 1000pF http://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A GND OUT OUT EN C3 2.2uF Any changing of specification will not be informed individual Page 1 of 7 SQ2153 CMOS Positive Elektronische Bauelemente Voltage Regulator Absolute Maximum Ratings Parameter Ratings Symbol Input Voltage VIN V PD/(VIN-VO) mA Output Current IOUT Output Voltage VOUT 1.5~3.8 Operating Ambient Temperature Topr -40~+85 Tj Junction Temperature Max. Junction Temperature Power Dissipation ( T=100 C) V o C o C -40~+125 150 Tj Max. o Unit 8 o C mW 380 PD EDS Classification B o Electrical Characteristics Ta=25 C unless otherwise noted Parameter Symbol 1 Min. -1.5% Max. Typ. 2 VOUT (E) Unit 1.5% Output Voltage VOUT (E) Output Current Io 300 _ Current Limit ILIM 300 450 -1 0.2 1 _ _ _ _ 1300 _ _ _ 30 50 -0.2 _ 0.2 -0.15 _ 0.15 0.02 0.1 0.2 0.4 7 o o Load Regulation REGLOAD VDROPOUT Dropout Voltage Quiescent Current IQ Line Regulation REGLINE -2.5% -0.1 -0.4 Input Voltage Over Temperature Shutdown VIN Note _ OTS _ 3 _ _ 400 VIN=VOUT(T)+2V,1o=1mA V 2.5% VIN=VOUT(T)+2V,1o=300mA mA VIN=VOUT(T)+2V,VOUT≥VOUT(E)*0.96 mA VIN=VOUT(T)+2V, Vo>1.2V VIN=VOUT(T)+2V,Io=1mA to300mA % 1.2V ≤ VOUT(T) ≤ 2.0V mV 2.0V < VOUT(T) ≤ 2.8V 150 _ 30 _ uA 1.2V ≤VOUT(T) ≤ 1.4V Io=1mA 1.4V< VOUT(T) ≤ 2.0V VIN=VOUT(T)+1 to 2.0V< VOUT(T)<4.0V VOUT(T)+2 4.0V<VOUT(T) % V C C Over Temperature Hystersis OTH Output Voltage Temperature Coefficient TC _ 30 _ ppm/ C ISC _ 150 300 mA Short Circuit Current 4 60 _ _ 50 _ _ 20 _ _ Power Supply Rejection PSRR Io=300mA Vo=VOUT(E)-2% 2.8V<VOUT(T) VIN=VOUT(T)+1V,Io=0mA 300 _ Condition o VIN=VOUT(T)+1V,VOUT<0.8V f=100Hz dB f=1kHz f=10kHz Io=100mA Co=2.2uF f=10Hz~100kHz Io=10mA Output Voltage Noise eN _ 30 _ uVrms Ground Pin Current IGND _ 35 _ uA VIN=VOUT(T)+2V,Io=1mA~300mA VEH 2 _ VEL 0 V VIN=2.7V to 7V EN Input Threshold EN Input Bias Current Shutdown Supply Current Shutdown Output Voltage http://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A _ VIN 0.4 Co=2.2uF IEH _ _ IEL _ _ 0.5 ISD _ 0.5 1 uA VIN=5V,Vo=0V,VEN<VEL 0 _ 0.4 V Io=0.4mA,VEN<VEL Vo,SD 0.1 uA VEN=VIN,VIN=2.7V to 7V VEN=0V,VIN=2.7V to 7V Any changing of specification will not be informed individual Page 2 of 7 SQ2153 CMOS Positive Elektronische Bauelemente Voltage Regulator Note 1: VOUT (E) =Effective Output Voltage (i.e. the output voltage when "VOUT (T) +2.0V" is provided at the VIN pin while maintaining a certain IOUT value). 2: VOUT (T) =Specified Output Voltage 3: VIN (MIN) =VOUT+V DROPOUT 4: To prevent the Short Circuit Current protection feature from being prematurely activated, the input voltage must be applied before a current source load is applied. Ordering Information(contd.) Part Number SQ2153-15 SQ2153-25 SQ2153-28 SQ2153-29 SQ2153-31 SQ2153-34 SQ2153-36 SQ2153-38 Marking 3E152 XXXX 3E252 XXXX 3E282 XXXX 3E292 XXXX 3E312 XXXX 3E342 XXXX 3E362 XXXX 3E382 XXXX Output Voltage Part Number 1.5V SQ2153-18 2.5V SQ2153-27 2.8V SQ2153-2H 2.9V SQ2153-30 3.1V SQ2153-33 3.4V SQ2153-35 3.6V SQ2153-37 Marking 3E182 XXXX 3E272 XXXX 3E2H2 XXXX 3E302 XXXX 3E332 XXXX 3E352 XXXX 3E372 XXXX Output Voltage 1.8V 2.7V 2.85V 3.0V 3.3V 3.5V 3.7V 3.8V Characteristics Curve ht tp://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A Any changing of specification will not be informed individual Page 3 of 7 SQ2153 Elektronische Bauelemente http://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A CMOS Positive Voltage Regulator Any changing of specification will not be informed individual Page 4 of 7 SQ2153 Elektronische Bauelemente http://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A CMOS Positive Voltage Regulator Any changing of specification will not be informed individual Page 5 of 7 SQ2153 Elektronische Bauelemente ht tp://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A CMOS Positive Voltage Regulator Any changing of specification will not be informed individual Page 6 of 7 SQ2153 Elektronische Bauelemente CMOS Positive Voltage Regulator Detailed Description The SQ2153 series of COMS regulators contain a PMOS pass transistor,voltage reference, error amplifier,over-current protection and thermal shutdown.The P-channel pass transistor receives data from the error amplifier, over-current shutdown, and thermal protection circuits. During normal operation, the error amplifier compares the output voltage to a precision reference. Over-current and Thermal shuto down circuits become active when the junction temperature exceeds150 C, or the current exceeds 300mA. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 120oC.The SQ2153 switches from voltage mode to current mode when the load exceeds the rated output current.This prevents over-stress. The SQ2153 also incorporates current fold-back to reduce power dissipation when the output is short circuited. This feature becomes active when the output drops below 0.8 volts, and reduces the current flow by 65%. Full current is restored when the voltage exceeds 0.8 volts. External Capacitors The SQ2153 is stable with an output capacitance to ground of 2.2uF or greater. Ceramic capacitors have the lowest ESR, and will offer the best AC performance. Conversely, Aluminum Elertrolytic capacitors exhibit the highest ESR, resulting in the poorest AC response. Unfortunately, large value ceramic capacitors are comparatively expensive. One option is to parallel a 0.1 uF ceramic capacitor with a 10 uF Aluminum Electrolytic. The benefit is low ESR, high capacitance, and low overall cost. A second capacitor is recommended between the input and ground to stabilize Vin. The input capacitor should be at least 0.1uF to have a beneficial effect. A third capacitor can be connected between the BY-PASS pin and GND. this capacitor can be a low cost Polyester Film variety between the value of 0.001 ~0.01 uF. A large capacitor improves the AC ripple rejection, but also makes the output come up slowly. This "Soft" turn-on is desirable in some applications to limit turn-on surges. All capacitors should be placed in close proximity to the pins. A "Quiet" ground termination is desirable . The can be achieved with a "Star" connection. Enable The Enable pin normally floats high. When actively, pulled low, the PMOS pass transistor shuts off, and all internal circuits are powered down. In this state, the quiescent current is less than 1uA. This pin behaves much like an electronic switch. ht tp://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A Any changing of specification will not be informed individual Page 7of 7