AS1353-18-T

austriamicrosystems AG is now ams AG The technical content of this austriamicrosystems datasheet is still valid. Contact information: Headquarters: ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten, Austria Tel: +43 (0) 3136 500 0 e-Mail: ams_sales@ams.com Please visit our website at www.ams.com AS1353, AS1356 L i n e a r L o w - D r o p o u t 1 5 0 m A Vo l ta g e R e g u l a t o r s 2 Key Features The integrated P-channel MOSFET output allows the devices to maintain a low supply-current at loads of up to150mA. A shutdown mode includes logic-controlled circuitry which reduces shutdown current to less than 1µA (max). Ultra-Low Dropout Voltage: 40mV @ 100mA load ! Output Voltage Range: +1.5 to +3.6V (100mV steps) ! Max Output Current: 150mA ! Output Voltage Accuracy: ±1% ! Low Shutdown Current: 1µA ! High PSRR: 60dB at 100Hz am lc s on A te G nt st il Integrated over-temperature and over-current protection circuitry switches the devices off in case of thermal overload or output short-circuit conditions. ! al id The AS1353/AS1356 are high-performance, fixed-voltage linear LDOs designed for use with capacitors of 1 to 10µF. The devices can deliver superior performance even under low dropout conditions when the power transistor operates in linear mode. lv 1 General Description Data Sheet The AS1353/AS1356 are optimized for low equivalentseries resistance (ESR) output capacitors. Additionally, all devices contain reversed battery protection which disconnects the internal circuitry and parasitic diodes if the battery is connected incorrectly. The AS1356 also features power-OK circuitry which can be used to monitor output regulation. All devices also feature an integrated error amplifier and built-in 1.25V reference, and output current is limited (380mA typ) via the on-chip current limiting circuitry. Multiple output voltages are available as standard products: 3.6, 3.3, 3.0, 2.7, 2.5, or 1.5V. All devices are available in a 5-pin SOT23 package. ! Integrated Overtemperature/Overcurrent Protection ! Reverse-Battery Protection (AS1353/AS1356) ! Power-OK Output (AS1356) ! Minimal External Components Required ! Operating Temperature Range: -40 to +85°C ! 5-pin SOT23 Package 3 Applications The devices are ideal for powering cordless and mobile phones, MP3 players, CD and DVD players, PDAs, handheld computers, digital cameras, and any other hand-held and/or battery-powered device. IN 1 5 OUT ni IN 1 ca Figure 1. Pinout and Application Diagrams GND 2 3 ch SHDNM AS1353 IN CIN 1µF Te +2.5 to +5.5V On Off 4 BP OUT AS1353 SHDNM BP GND 2 SHDNM Preset Output 1.5 to 3.6V, 150mA COUT 1µF +2.5 to +5.5V Off CBP 0.01µF www.austriamicrosystems.com AS1356 3 4 POK IN OUT CIN 1µF COUT 1µF Preset Output 1.5 to 3.6V, 150mA AS1356 On GND 5 OUT Revision 1.03 100kΩ SHDNM GND POK To Microprocessor 1 - 13 AS1353/AS1356 Data Sheet - P i n o u t 4 Pinout Pin Assignments GND 2 Pin Descriptions AS1353 GND 2 3 4 BP SHDNM 5 OUT AS1356 3 4 POK am lc s on A te G nt st il SHDNM IN 1 5 OUT lv IN 1 al id Figure 2. Pin Assignments (Top View) Table 1. AS1353 Pin Descriptions Pin Number 1 2 Pin Name Description IN LDO Input. Supply voltage can range from 2.5 to 5.5V. Bypass with a 1µF capacitor to GND (see Capacitor Selection and Regulator Stability on page 10). GND 3 SHDNM 4 BP 5 OUT Ground. This pin also functions as a heat sink. Solder to a large pad or the circuit-board ground plane to maximize power dissipation. Active-Low Shutdown Input. A logic low reduces the supply current to < 1µA. Note: Connect to IN for normal operation. Reference-Noise Bypass. Bypass with a low-leakage, 0.01µF ceramic capacitor for reduced noise at the output. LDO Output. Fixed 1.5, 2.5, 2.7, 3.0, 3.3, and 3.6V output. Sources up to 150mA. Table 2. AS1356 Pin Descriptions IN GND SHDNM ch 3 Te 4 5 Description LDO Input. Input voltage can range from 2.5 to 5.5V. Bypass with 1µF to GND (see Capacitor Selection and Regulator Stability on page 10). Ground. This pin also functions as a heat sink. Solder to a large pad or the circuit-board ground plane to maximize power dissipation. ni 1 2 Pin Name ca Pin Number Active-Low Shutdown Input. A logic low reduces the supply current to < 1µA. Note: Connect to pin IN for normal operation. POK Power-OK Output. Active-low, open-drain output indicates an out-of-regulation condition. Connect a 100kΩ pull-up resistor to pin OUT for logic levels. Note: Leave this pin unconnected if the power-OK feature is not used. OUT LDO Output. Fixed 1.5, 2.5, 2.7, 3.0, 3.3, and 3.6V output. Sources up to 150mA. www.austriamicrosystems.com Revision 1.03 2 - 13 AS1353/AS1356 Data Sheet - A b s o l u t e Maximum Ratings 5 Absolute Maximum Ratings Stresses beyond those listed in Table 3 may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in Section 6 Electrical Characteristics on page 4 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 3. Absolute Maximum Ratings Max -7 +7 V SHDNM to IN -7 +0.3 V POK, BP, OUT to GND -0.3 VIN + +0.3 V Output Short-Circuit Duration Indefinite Continuous Power Dissipation (TAMB = +70ºC) V 571 -40 Units mW +85 ºC Junction Temperature +150 ºC ΘJA +140 ºC/W +150 ºC Comments Derate 7.1mW/ºC above +70ºC am lc s on A te G nt st il Operating Temperature Range Typ al id Min lv Parameter IN, SHDNM to GND Storage Temperature Range -65 +260 ºC The reflow peak soldering temperature (body temperature) specified is in accordance with IPC/JEDEC J-STD-020C “Moisture/Reflow Sensitivity Classification for non-hermetic Solid State Surface Mount Devices” Te ch ni ca Package Body Temperature Internally limited www.austriamicrosystems.com Revision 1.03 3 - 13 AS1353/AS1356 Data Sheet - E l e c t r i c a l Characteristics 6 Electrical Characteristics (VIN = VOUT(Nominal) + 1V, SHDNM = IN, TAMB = -40 to +85ºC (unless otherwise specified). Typical values are at TAMB = +25ºC. Limits are 100% production tested at TAMB = +25ºC. Table 4. Electrical Characteristics Conditions Output Voltage Accuracy IOUT ILIM Maximum Output Current Current Limit IQ Ground Pin Current VIN -VOUT 1 ΔVLNR Line Regulation ΔVLDR Load Regulation en Output Voltage Noise PSRR Shutdown IOUT = 100µA IOUT = 150mA IOUT = 100µA IOUT = 50mA IOUT = 100mA IOUT = 150mA VIN = 2.5V or (VOUT + 0.1) to 4.5V, IOUT = 1mA VIN = 2.5V or (VOUT + 0.1) to 5.5V, IOUT = 1mA IOUT = 100µA to 150mA, COUT = 1µF COUT = 1µF, f = 10Hz to 100kHz, AS1353 CBP = 0.01µF COUT = 1µF, AS1356 f = 10Hz to 100kHz Typ Max 5.5 1 3 380 70 115 0.05 20 40 60 Output Voltage AC Power-Supply Rejection Ratio 2 180 100 CBP = 0.01µF, no load (AS1353) IOFF Shutdown Supply Current SHDNM = GND VIH VIL SHDNM Input Threshold ISHDNM SHDNM Input Bias Current ca Exit Delay from 34 Shutdown , ni -0.2 0 0.2 -0.8 0 0.8 SHDNM = IN or GND µA mV %/V 30 µVRMS 110 60 TAMB = +25ºC TAMB = +85ºC VIN = 2.5 to 5.5V % 0.001 0.02 %/mA f = 100Hz, COUT = 1µF, (CBP = 0.01µF, AS1353) tON Unit V mA mA am lc s on A te G nt st il Dropout Voltage TAMB = +25ºC, IOUT = 100µA TAMB = -40 to +85ºC, IOUT = 100µA to 150mA Min 2.5 -1 -3 150 160 al id Parameter Input Voltage lv Symbol VIN 30 150 0.01 0.04 1 2.0 TAMB = +25ºC TAMB = +85ºC 0.03 0.2 0.4 100 dB µs µA V nA Power-OK Output (AS1356 only) Power-OK Voltage Threshold ch VPOK VOL Te POK Output Voltage Low POK Output Leakage Current Thermal Protection TSHDNM Thermal Shutdown Temperature ΔTSHDNM Thermal Shutdown Hysteresis www.austriamicrosystems.com IOUT = 0, VOUTFALLING Hysteresis, IOUT = 0 ISINK = 1mA 92 95 1 0 ≤ VPOK ≤ 5.5V, VOUT in regulation AS1353 AS1356 AS1353 AS1356 Revision 1.03 150 165 15 20 97 % VOUT 0.4 V 1 µA ºC ºC ºC 4 - 13 AS1353/AS1356 Data Sheet - E l e c t r i c a l Characteristics Te ch ni ca am lc s on A te G nt st il lv al id 1. Dropout voltage = VIN - VOUT when VOUT is 100mV < VOUT for VIN = VOUT +0.5V (applies only to output voltages ≥ 2.5V). 2. The rise and fall time of the shutdown signal must not exceed 1ms. 3. The delay time is defined as time required to set VOUT to 95% of its final value. 4. Guaranteed by design. www.austriamicrosystems.com Revision 1.03 5 - 13 AS1353/AS1356 Data Sheet - Ty p i c a l Operating Characteristics 7 Typical Operating Characteristics VOUT = +3.0V, VIN = +3.6V, CIN = COUT = 1µF, SHDNM = IN, TAMB = +25ºC (unless otherwise specified) Figure 3. Ground Pin Current vs. Input Voltage Figure 4. Ground Pin Current vs. Output Load 120 . 100 IOUT = 0mA 80 60 40 20 0 110 VIN = 5V 100 VIN = 3.5V 90 80 70 60 0 1 2 3 4 5 0 6 25 Input Voltage (V) 75 100 125 150 Figure 6. Output Voltage vs. Input Voltage 3.5 130 VIN = 5V, IOUT = 150mA 120 110 VIN = 3.6V, IOUT = 150mA 100 90 80 IOUT = 150mA 3 Output Voltage (V) . . 50 Output Load (mA) Figure 5. Ground Pin Current vs. Temperature Ground Pin Current (µA) al id Ground Pin Current (µA) IOUT = 150mA lv 120 am lc s on A te G nt st il Ground Pin Current (µA) . 140 VIN = 3.6V, IOUT = 0mA IOUT = 0mA 2.5 2 1.5 1 0.5 70 VIN = 5V, IOUT = 0mA 60 -40 0 -20 0 20 40 60 80 0 100 1 ca Figure 7. Output Voltage vs. Output Load ni Te 3 VIN = 3.6V 2.95 4 5 6 3.04 3.03 VIN = 5V 3 Figure 8. Output Voltage vs. Temperature Output Voltage (V) . 3.05 ch Output Voltage (V) . 3.1 2 Input Voltage (V) Temperature (°C) VIN = 3.6V, IOUT = 0mA 3.02 3.01 VIN = 5V, IOUT = 150mA 3 VIN = 3.6V, IOUT = 150mA 2.99 VIN = 3.6V, IOUT = 0mA 2.9 0 25 50 75 100 125 150 2.98 -40 Output Load (mA) www.austriamicrosystems.com -20 0 20 40 60 80 100 Temperature (°C) Revision 1.03 6 - 13 AS1353/AS1356 Data Sheet - Ty p i c a l Operating Characteristics Figure 9. Dropout Voltage vs. Output Load Figure 10. PSRR vs. Frequency 80 70 125 60 100 75 +85°C +25°C 50 50 40 al id PSRR (dB) . 30 20 -45°C 25 10 0 0 0 25 50 75 100 125 150 10 100 1000 10000 100000 Frequency (Hz) am lc s on A te G nt st il Output Load (mA) lv Dropout Voltage (V) . 150 VOUT 20mV/Div VIN 4V 5V Figure 11. Line Transient Response; IOUT = 50mA Te ch ni ca 10ms/Div www.austriamicrosystems.com Revision 1.03 7 - 13 AS1353/AS1356 Data Sheet - D e t a i l e d Description 8 Detailed Description The AS1353/AS1356 are low-dropout, low-quiescent-current linear regulators intended for LDO regulator applications where output current load requirements range from no load to 150mA. All devices come standard with fixed output voltages of 1.5 to 3.6V (see Ordering Information on page 12). AS1353/AS1356 ReverseBattery Protection SHDNM Thermal Overload Protection Shutdown/ Power-On Control Logic AS1356 only Error Amplifier + OUT R2 BP 1 Trimmable Reference Voltage am lc s on A te G nt st il Bandgap Voltage & Current Reference lv IN al id Figure 12. Block Diagram R1 POK 2 – 95% GND + 1 2 AS1353 only AS1356 only As illustrated in Figure 12, the devices comprise a 1.25V reference, error amplifier, P-channel MOSFET pass transistor, power-OK comparator, internal feedback voltage divider, current limiter, reverse-battery protection, thermal sensor and shutdown logic. The 1.25V bandgap reference is connected to the inverting input of the error amplifier. The error amplifier compares this reference with the feedback voltage and amplifies the difference. If the feedback voltage is lower than the reference voltage, the P-channel MOSFET gate is pulled lower, allowing more current to pass to the output, and increases the output voltage. If the feedback voltage is too high, the pass-transistor gate is pulled up, allowing less current to pass to the output. The output voltage feeds back through an internal resistor voltage divider connected to pin OUT. ca Output Voltages Standard products are factory-set with output voltages of from 1.5 to 3.6V. A two-digit suffix of the part number identifies the nominal output voltage (see Ordering Information on page 12). ni Non-standard devices are available. Contact austriamicrosystems AG for more information. Internal P-Channel MOSFET Pass Transistor ch The integrated 0.5Ω (typ) P-channel MOSFET pass transistor requires no base drive, which reduces quiescent current significantly, and does not exhibit the problems associated with PNP-based regulators, such as dropout when the pass transistor saturates or high base-drive currents under large load conditions. Te The devices consume only 115µA quiescent current in dropout, light-load, or heavy-load applications (see Typical Operating Characteristics on page 6). Power-OK The AS1356’s power-ok circuitry is built around an N-channel MOSFET. The circuitry monitors the voltage on pin 5 (OUT) and if the voltage goes out of regulation (e.g. during dropout, current limit, or thermal shutdown) pin POK goes low. www.austriamicrosystems.com Revision 1.03 8 - 13 AS1353/AS1356 Data Sheet - D e t a i l e d Description The power-OK feature is not active during shutdown and provides a power-on-reset (POR) function that can operate down to VIN = 1V. A capacitor to GND may be added to generate a POR delay. To obtain a logic-level output, connect a pull-up resistor from pin POK to pin OUT. Larger values for this resistor will help minimize current consumption; a 100kΩ resistor is perfect for most applications (see Figure 13). Reverse-Battery Protection al id The AS1353/AS1356 contain integrated reverse-battery protection circuitry which monitors the polarity of pins IN and SHDNM and disconnects the internal circuitry and parasitic diodes if the battery is connected incorrectly. Reverse supply current is limited to 1mA if VIN = VSHDNM falls below ground. Load current is also limited when VIN or VSHDNM are reverse biased with respect to ground. Current Limiting am lc s on A te G nt st il Noise Reduction lv The AS1353/AS1356 include current limiting circuitry to protect against short-circuit conditions. The circuitry monitors and controls the gate voltage of the P-channel MOSFET, limiting the output current to 380mA (typ). The P-channel MOSFET output can be shorted to ground for an indefinite period of time without damaging the device. The AS1353 uses an external 0.01µF bypass capacitor (CBP) at pin BP to reduce output noise. An internal pre-charge circuit is used to reduce start-up time. The use of CBP > 0.01µF improves noise performances but increases start-up time. Thermal-Overload Protection The devices are protected against thermal runaway conditions by the integrated thermal sensor circuitry. Thermal shutdown is an effective means to prevent die overheating since the power transistor is the principle heat source in the device. If the junction temperature exceeds 165ºC (typ, AS1356) or 150ºC (typ, AS1353), the thermal sensor starts the shutdown logic, at which point the P-channel MOSFET is switched off. After the device temperature has dropped by approximately 20ºC, the thermal sensor will turn the P-channel MOSFET on again. Note that this will be exhibited as a pulsed output under continuous thermal-overload conditions. Note: The absolute maximum junction-temperature rating of +150ºC should not be exceeding during continual operation. Operating Region and Power Dissipation ni ca Maximum power dissipation is determined by the thermal resistance of the case and circuit board, the temperature difference between the die junction and ambient air, and the rate of air flow. The power dissipation of the device is calculated by: P = IOUT (VIN - VOUT) (EQ 1) PMAX = (TJ - TAMB) / (ΘJB + ΘJA) (EQ 2) ch Maximum power dissipation is calculated by: Where: TJ - TAMB is the temperature difference between the device die junction and the surrounding air. Te ΘJB or ΘJC is the thermal resistance of the package. ΘJA is the thermal resistance through the printed circuit board, copper traces, and other materials to the surrounding air. Note: Pin GND is a multi-function pin providing a connection to the system ground and acting as a heat sink. This pin should be connected to the system ground using a large pad or ground plane. www.austriamicrosystems.com Revision 1.03 9 - 13 AS1353/AS1356 Data Sheet - Ty p i c a l Application 9 Typical Application Figure 13. Typical Application Diagrams CIN 1µF Preset Output 1.5 to 3.6V, 150mA OUT IN COUT 1µF AS1353 Off BP IN OUT CIN 1µF COUT 1µF AS1356 SHDNM On +2.5 to +5.5V On Off GND GND POK To Microprocessor am lc s on A te G nt st il lv CBP 0.01µF 100kΩ SHDNM Preset Output 1.5 to 3.6V, 150mA al id +2.5 to +5.5V Capacitor Selection and Regulator Stability Ceramic capacitors are highly recommended as they offer distinct advantages over their tantalum and aluminum electrolytic components. For stable operation with load currents up to 150mA over the entire device temperature range, use a 1µF (min) ceramic output capacitor with an ESR