www.fairchildsemi.com ILC6363 Step-Up DC-DC Converter for One-Cell Lithium-Ion Batteries Features • ILC6363CIR-50: Fixed 5.0V output; custom voltages are available upon request • ILC6363CIR-ADJ: Adjustable output to 6V maximum • Capable of 500mA output current • Peak efficiency: > 90% at VOUT = 3.6V, IOUT = 300mA, VIN = 3.6V • No external diode is required (synchronous rectification) • Battery input current of 300µA at no load • True load disconnect from battery input in shutdown (1µA) • Oscillator frequency: 300kHz ±15% • Low battery detector with 100ms transient rejection delay • Power good output flag when VOUT is in regulation • MSOP-8 package voltage exceeds the output voltage by more than 800mV, the output will begin to track the input linearly. The ILC6363 is a direct replacement for ILC6360, in applications where SYNC pin is not used. The PFM or PWM operating mode is user selectable through SEL pin connected to ground or left open, respectively. The choice should be dependent upon the current to be delivered to the load: PFM is recommended for better efficiency at light load,while PWM is recommended for more than 50mA load current. In shutdown mode, the device allows true load disconnect from battery input. Configured as a 300kHz, fixed frequency PWM/PFM boost converter, the ILC6363 can perform a limited buck operation in PFM mode, when the input voltage is up to 0.8V higher than the output voltage. Applications • Cellular phones • Palmtops, PDAs and portable electronics • Equipment using single Lithium-Ion batteries Description The ILC6363 step-up/step-down DC-DC converter is a switch mode converter, capable of supplying up to 500mA output current, at a fixed or user selectable output voltage. The range of input, and output voltage options makes the ILC6363 ideal for Lithium-ion (Li-ion), or any other battery application, where the input voltage range spans above and below the regulated output voltage. When ILC6363’s input The ILC6363 is unconditionally stable with no external compensation; the sizes of the input and output capacitors influence input and output ripple voltages, respectively. Since the ILC6363 has an internal synchronous rectifier, the standard fixed voltage version requires minimal external components: an inductor, an input capacitor, and an output capacitor. If a tantalum output capacitor is used, then an additional 10µF ceramic output capacitor will help reduce output ripple voltage. Other features include a low battery input detector with a built-in100ms transient rejection delay and a power good indicator useful as a system power on reset. Typical Circuit ILC6363CIR-XX 1 VOUT 8 + 15µH VOUT + 2 VIN GND 7 3 LBI/SD LBO 6 Low Battery Detector Output 4 SEL POK 5 Power Good Output (Fixed VOUT only) R5 ON OFF LX COUT 10µF 100µF R6 90 4.2 80 3.6 70 3.0 Battery Voltage (V) VIN 2.7V to 4.2V Optimized to Maximize Battery Life L ILC6363 Efficiency (%) CIN 100µF + MSOP-8 PWM Time PFM Figure 1. REV. 1.3.5 5/21/02 ILC6363 PRODUCT SPECIFICATION Pin Assignments LX 1 8 VOUT VIN 2 7 GND LBO LB/SD 3 6 5 POK SEL 4 LX 1 8 VOUT VIN 2 7 GND LB/SD 3 6 LBO SEL 4 5 VFB MSOP MSOP (TOP VIEW) (TOP VIEW) ILC6363CIR-XX ILC6363CIR-ADJ Pin Definitions Pin Number Pin Name Pin Function Description 1 LX Inductor input. Inductor L connected between this pin and the battery 2 VIN Input Voltage. Connect directly to battery 3 LBI/SD Low battery detect input and shutdown. Low battery detect threshold is set with this pin using a potential divider. If this pin is pulled to logic low then the device will shutdown. 4 SEL Select Input. A low logic level signal applied to this pin selects PFM operation mode. If the pin is left open or high logic level is applied, PWM mode is selected. POK (ILC6363CIR-XX 5 VFB (ILC6363CIR-ADJ) 6 Power Good Output. This open drain output pin will go high when output voltage is within regulation, 0.92•VOUT(NOM) < Vthreshold < 0.98•VOUT(NOM) Feedback Input. This pin sets the adjustable output voltage via an external resistor divider network. The formula for choosing the resistors is shown in the “Applications Information” section. LBO Low Battery Output. This open drain output will go low if the battery voltage is below the low battery threshold set at pin 3. 7 GND Ground of the IC. Connect this pin to the battery and system ground 8 VOUT Regulated output voltage. Absolute Maximum Ratings Parameter Voltage on VOUT pin Symbol Ratings Units VOUT -0.3 to 7 V -0.3 to 7 V ILX 1 A ISINK(LBO) 5 mA Voltage on LBI, Sync, LBO, POK, VFB, LX and VIN pins Peak switch current on LX pin Current on LBO pin Continuous total power dissipation at 85°C PD 315 mW Short circuit current ISC Internally protected (1 sec. duration) A Operating ambient temperature TA -40 to 85 °C Maximum junction temperature TJ(MAX) 150 °C Tstg -40 to 125 °C 300 °C 206 °C/W Storage temperature Lead temperature (soldering 10 sec.) Package thermal resistance 2 θJA REV. 1.3.5 5/21/02 PRODUCT SPECIFICATION ILC6363 Electrical Characteristics ILC6363CIR-50 in PFM Mode (SEL in LOW State) Unless otherwise specified, all limits are at VIN = VLBI = 3.6V, IOUT = 1mA and TA = 25°C, test circuit Figure 1. BOLDFACE type indicate limits over the specified operating temperature range. (Note 2) Parameter Output Voltage Symbol VOUT(nom) Maximum Output Current IOUT Load Regulation ∆VOUT Conditions 2.7V < VIN < 4.2V Min. Typ. Max. Units 4.875 4.825 5.0 5.125 5.175 V VOUT ≥ 0.96VOUT(nom), VIN = 2.7V 1mA < IOUT < 50mA 250 mA 1 % VOUT No Load Battery Input Current Efficiency IIN (no load) IOUT = 0mA 300 µA η IOUT = 20mA 85 % Electrical Characteristics ILC6363CIR-50 in PWM Mode (SEL Open) Unless otherwise specified, all limits are at VIN = VLBI = 3.6V, IOUT = 100mA and TA = 25°C, test circuit Figure 1. BOLDFACE type indicate limits over the full operating temperature range. (Note 2) Parameter Output Voltage Symbol VOUT(nom) Conditions 2.7V < VIN < 4.2V Min. Typ. Max. Units 4.850 4.800 5.0 5.150 5.200 V Maximum Output Current IOUT VOUT ≥ 0.92VOUT(nom) 500 mA Load Regulation ∆VOUT 50mA < IOUT < 200mA 50mA < IOUT < 300mA 3 4 % IOUT = 300mA 92 % VOUT Efficiency REV. 1.3.5 5/21/02 η 3 ILC6363 PRODUCT SPECIFICATION General Electrical Characteristics TA = 25°C, VIN = VLBI = 3.6V, IOUT = 50mA, unless otherwise specified. BOLDFACE indicate limits over the specified operating temperature range. (Note 2). Parameter Symbol Conditions Min. LBO output voltage low VLBO(low) ISINK = 2mA, open drain output, VLBI = 1V LBO output leakage current ILBO(hi) VLBO = 5V Shutdown input voltage low VSD(low) Shutdown input voltage high VSD(hi) 1 1.5 SEL input voltage high VSEL(hi) SEL input voltage low VSEL(low) POK output voltage low VPOK(low) POK output voltage high VPOK(hi) POK output leakage Current IL(POK) POK threshold VTH(POK Typ. 1 Max. Units 0.4 V 2 µA 0.4 V 6 V V ISINK = 2mA, open drain output 6V at pin 5 0.92xVOUT 0.95xVOUT POK hysteresis VHYST Feedback voltage (ILC6363CIR-ADJ only) VFB Output voltage adjustment range (ILC6363CIR-ADJ only) VOUT(ADJ) min VOUT(ADJ) max VIN = 0.9V, IOUT = 50mA VIN = 3V, IOUT = 50mA 2.5 6 Minimum startup voltage VIN(start) IOUT = 10mA, PWM mode 0.9 Input voltage range VIN VOUT = VOUT(nominal) ± 4% IOUT = 10mA Battery input current in load disconnect mode IIN(SD) VLBI/SD < 0.4V, VOUT = 0V (short circuit) Switch on resistance Rds(on) N-Channel MOSFET P-Channel MOSFET Oscillator frequency fosc LBI input threshold VREF Input leakage current ILEAK Pins LB/SD,SEL and VFB, (Note 3) LBI hold time tHOLD(LBI) (Note 4) 0.4 V 0.4 V 6 V 2 µA 0.98xVOUT V 50 1.225 1.212 1.250 0.9 1 1 mV 1.275 1.288 V V 1 V VOUT(nominal) + 0.8V V 10 µA 400 750 mΩ 255 300 345 kHz 1.175 1.150 1.250 1.325 1.350 V 200 nA 100 120 mS Notes: 1. Absolute maximum ratings indicate limits which, when exceeded, may result in damage to the component. Electrical specifications do not apply when operating the device outside its rated operating conditions. 2. Specified min/max limits are production tested or guaranteed through correlation based on statistical control methods. Measurements are taken at constant junction temperature as close to ambient temperature as possible using low duty cycle pulse testing. 3. Guaranteed by design 4. In order to get a valid low-battery-output (LBO) signal, the input voltage must be lower than the low-battery-input (LBI) threshold for a duration greater than the low battery hold time (Hold(LBI)). This feature eliminates false triggering due to voltage transients at the battery terminal. 4 REV. 1.3.5 5/21/02 PRODUCT SPECIFICATION ILC6363 Application Information PWM Mode Operation The ILC6363 performs boost DC-DC conversion by controlling the switch element as shown in the simplified circuit in Figure 3 below. The ILC6363 uses a PWM or Pulse Width Modulation technique. The switches are constantly driven at typically 300kHz. The control circuitry varies the power being delivered to the load by varying the on-time, or duty cycle, of the switch SW1 (see Figure 5). Since more on-time translates to higher current build-up in the inductor, the maximum duty cycle of the switch determines the maximum load current that the device can support. The minimum value of the duty cycle determines the minimum load current that can maintain the output voltage within specified values. Figure 3. Basic Boost Circuit When the switch is closed, current is built up through the inductor. When the switch opens, this current is forced through the diode to the output. As this on and off switching continues, the output capacitor voltage builds up due to the charge it is storing from the inductor current. In this way, the output voltage is boosted relative to the input. In general, the switching characteristic is determined by the output voltage desired and the current required by the load. The energy transfer is determined by the power stored in the coil during each switching cycle. PL = ƒ(tON, VIN) Synchronous Rectification The ILC6363 also uses a technique called “synchronous rectification” which removes the need for the external diode used in other circuits. The diode is replaced with a second switch or in the case of the ILC6363, an FET as shown in Figure 4 below. ILC6363 SW2 VOUT + PWM/PFM CONTROLLER SW1 The other key advantage of the PWM type controllers over pulse frequency modulated (PFM) types is that the radiated noise due to the switching transients will always occur at (fixed) switching frequency. Many applications do not care much about switching noise, but certain types of applications, especially communication equipment, need to minimize the high frequency interference within their system as much as possible. Use of the PWM converter in those cases is desirable. PFM Mode Operation VIN LX There are two key advantages of the PWM type controllers. First, because the controller automatically varies the duty cycle of the switch's on-time in response to changing load conditions, the PWM controller will always have an optimized waveform for a steady-state load. This translates to very good efficiency at high currents and minimal ripple on the output. Ripple is due to the output cap constantly accepting and storing the charge received from the inductor, and delivering charge as required by the load. The “pumping” action of the switch produces a sawtooth-shaped voltage as seen by the output. POK For light loads the ILC6363 can be switched to PFM. This technique conserves power by only switching the output if the current drain requires it. As shown in the Figure 5, the waveform actually skips pulses depending on the power needed by the output. This technique is also called “pulse skipping” because of this characteristic. GND SHUTDOWN CONTROL SEL VREF + - DELAY LBO LB/SD Figure 4. Simplified ILC6383 block diagram The two switches now open and close in opposition to each other, directing the flow of current to either charge the inductor or to feed the load. The ILC6363 monitors the voltage on the output capacitor to determine how much and how often to drive the switches. REV. 1.3.5 5/21/02 In the ILC6363, the switchover from PWM to PFM mode is determined by the user to improve efficiency and conserve power. The Dual PWM/PFM mode architecture was designed specifically for applications such as wireless communications, which need the spectral predictability of a PWM-type DC-DC converter, yet also need the highest efficiencies possible, especially in Standby mode. 5 ILC6363 PRODUCT SPECIFICATION Switch Waveform 2 VIN ILC6363 Shutdown R5 3 VSET + LBI/SD R6 1.25V Internal Reference VOUT 7 GND Figure 5. PFM Waveform Other Considerations The other limitation of PWM techniques is that, while the fundamental switching frequency is easier to filter out since it's constant, the higher order harmonics of PWM will be present and may have to be filtered out, as well. Any filtering requirements, though, will vary by application and by actual system design and layout, so generalizations in this area are difficult, at best. However, PWM control for boost DC-DC conversion is widely used, especially in audio-noise sensitive applications or applications requiring strict filtering of the high frequency components. Low Battery Detector The ILC6363's low battery detector is a based on a CMOS comparator. The negative input of the comparator is tied to an internal 1.25V (nominal) reference, VREF. The positive input is the LBI/SD pin. It uses a simple potential divider arrangement with two resistors to set the LBI threshold as shown in Figure 6. The input bias current of the LBI pin is only 200nA. This means that the resistor values R1 and R2 can be set quite high. The formula for setting the LBI threshold is: 6 LBO DELAY 100ms - 3.3V RPU Figure 6. Low Battery Detector The output of the low battery detector is an open drain capable of sinking 2mA. A 10kΩ pull-up resistor is recommended on this output. For VLBI < 1.25V The low battery detector can also be configured for voltages <1.25V by bootstrapping the LBI input from VOUT. The circuitry for this is shown in Figure 7. ILC6363 8 VOUT R2 VIN R1 3 LBI/SD + 1.25V Internal Reference 7 GND Figure 7. VLBI < 1.25V VLBI = VREF x (1+R5/R6) The following equation is used when VIN is lower than 1.25V: Since the LBI input current is negligible (<200nA), this equation is derived by applying voltage divider formula across R6. A typical value for R6 is 100kΩ. R1 = R2 x [(VREF – VIN) / (VOUT – VREF)], where VREF = 1.25V (nom.) R5 = 100kΩ x [(VLBI/VREF) -1], where VREF=1.25V (nom.) The LBI detector has a built in delay of 120ms. In order to get a valid low-battery-output (LBO) signal, the input voltage must be lower than the low-battery-input (LBI) threshold for a duration greater than the low battery hold time (thold(LBI)) of 120msec. This feature eliminates false triggering due to voltage transients at the battery terminal caused by high frequency switching currents. 6 This equation can also be derived using voltage divider formula across R2. A typical value for R2 is 100kΩ. Shut Down The LBI pin is shared with the shutdown pin. A low voltage (<0.4V) will put the ILC6363 into a power down state. The simplest way to implement this is with an FET across R6 as shown in Figure 8. Note that when the device is not in PWM mode or is in shutdown the low battery detector does not operate. REV. 1.3.5 5/21/02 PRODUCT SPECIFICATION ILC6363 When the ILC6363 is shut down, the synchronous rectifier disconnects the output from the input. This ensures that there is only leakage (IIN < 1µA typical) from the input to the output so that the battery is not drained when the ILC6363 is shut down. 1A Schottky Diodes -V 0.01µF 0.01µF 2 VIN L ILC6363 R5 LBI/SD ON/OFF 2 VIN VIN 3 ILC6363 1 LX Figure 10. Negative Output Voltage R6 7 GND External Component Selection Inductors Figure 8. Shut Down Control Power Good Output (POK) The POK output of the ILC6363 indicates when VOUT is within the regulation tolerance of the set output voltage. POK output is an open drain device output capable of sinking 2mA. It will remain pulled low until the output voltage has risen to typically 95% of the specified VOUT. Note that a pull-up resistor must be connected from the POK output (pin 5 of ILC6363CIR-XX) to either ILC6363’s output or to some other system voltage source. The ILC6363 is designed to work with a 15µH inductor in most applications. There are several vendors who supply standard surface mount inductors to this value. Suggested suppliers are shown in table 1. Higher values of inductance will improve efficiency, but will reduce peak inductor current and consequently ripple and noise, but will also limit output current. Vendor Part Number Contact Coilcraft D03316P-153 D01608C-153 (847) 639-6400 Adjustable Output Voltage Selection muRata LQH4N150K LQH3C150K (814) 237-1431 The ILC6363-ADJ allows the output voltage to be set using a potential divider. The formula for setting the adjustable output voltage is; Sumida CDR74B-150MC CD43-150 CD54-150 (847) 956-0666 VOUT = VFB x (1+R1/R2), R1+R2 ≤ 100kΩ TDK NLC453232T-150K (847) 390-4373 Where VFB is the threshold set which is 1.25V nominal. L VOUT 1 15mH VIN 2 1 to 3-cell LX VIN VOUT 8 GND 7 + R5 ON OFF Capacitors ILC6363-ADJ CIN 100µF 100µF COUT R1 3 LBI/SD 4 SEL LBO 6 VFB 5 R6 R2 MSOP-8 PWM PFM VOUT = 1.25 (1+R1/R2) Figure 9. Adjustable Voltage Configuration Negative Voltage Output It is possible to generate a negative output voltage as a secondary supply using the ILC6363. This negative voltage may be useful in some applications where a negative bias voltage at low current is required. REV. 1.3.5 5/21/02 Input Capacitor The input capacitor is necessary to minimize the peak current drawn from the battery. Typically a 100µF tantalum capacitor is recommended. Low equivalent series resistance (ESR) capacitors will help to minimize battery voltage ripple. Output Capacitor Low ESR capacitors should be used at the output of the ILC6363 to minimize output ripple. The high switching speeds and fast changes in the output capacitor current, mean that the equivalent series impedance of the capacitor can contribute greatly to the output ripple. In order to minimize these effects choose an output capacitor with less than 10nH of equivalent series inductance (ESL) and less than 100mΩ of equivalent series resistance (ESR). Typically these characteristics are met with ceramic capacitors, but may also be met with certain types of tantalum capacitors. Suitable vendors are shown in the following table. 7 PRODUCT SPECIFICATION Description ILC6363 Vendor Contact 3. Keep the traces for the power components wide, typically >50mil or 1.25mm. 4. Place the external networks for LBI and VFB close to the ILC6363, but away from the power components as far as possible. T495 series tantalum Kemet (864) 963-6300 595D series tantalum Sprague (603) 224-1961 TAJ, TPS series tantalum AVX (803) 946-0690 X5R Ceramic X7R Ceramic TDK (847) 390-4373 Grounding AVX (803) 946-0690 1. muRata www.murata.com Use a star grounding system with separate traces for the power ground and the low power signals such as LBI/SD and VFB. The star should radiate from where the power supply enters the PCB. 2. On multilayer boards use component side copper for grounding around the ILC6363 and connect back to a quiet ground plane using vias. High frequency switching and large peak currents means PCB design for DC-DC converters requires careful consideration. As a general rule place the DC-DC converter circuitry well away from any sensitive RF or analog components. The layout of the DC-DC converters and its external components are also based on some simple rules to minimize EMI and output voltage ripple. CIN 100µF VIN VOUT 1 15 µH ON/OFF PWM PFM Layout 1. ILC6363 L1 Place all power components, ILC6363, inductor, input capacitor and output capacitor as close together as possible. VOUT 8 2 VIN GND 7 3 LBI/SD LBO 6 4 SEL VFB 5 LX + COUT 100µF R1 R3 Load Layout and Grounding Considerations R2 Local "Quiet" Ground Power Ground 2. Keep the output capacitor as close to the ILC6363 as possible with very short traces to the VOUT and GND pins. Typically it should be within 0.25 inches or 6mm. Figure 11. Recommended Application Circuit Schematic for ILC6363CIR-ADJ U1 ILC6363ADJ U1 ILC6363XX C2 100µF L1 1 LX VOUT 8 15µH 2 VIN VIN ON GND 7 R1 R3 LBO 6 VIN 10K ON LBO OFF OFF SEL PWM PFM GND 4 SEL POK/VFB 5 1 LX VOUT 8 15µH 10K 3 LBI L1 C2 100µF VOUT C1 100µF POK SEL PWM PFM GND 2 VIN GND 7 3 LBI LBO 6 4 SEL VOUT C1 100µF R1 R3 10K LBO VFB POK/VFB 5 R2 NOTE: R1 and R2 are user determined values to set VOUT = VFB(1+R1/R2) R1+R2 ≤ 100kΩ REV. 1.3.5 5/21/02 8 ILC6363 PRODUCT SPECIFICATION Evaluation Board Parts List for Printed Circuit Board Shown on the Previous Page Label Part Number Description U1 ILC6363CIR-ADJ Fairchild Semiconductor DC-DC converter C GRM44-1 X5R 107K 6.3 muRata 100µF, ceramic capacitor L1 LQS66C150M04 muRata 15µH, 1.3A R1 and R2 — Dale, Panasonic User determined values R3 — Dale, Panasonic 10kΩ, 1/10W, SMT Label 9 Manufacturer Part Number Manufacturer Description U1 ILC6363CIR-XX Fairchild Semiconductor DC-DC converter C GRM44-1 X5R 107K 6.3 muRata 100µF, ceramic capacitor L1 LQS66CA150M04 muRata 15µH, 1.3A R1 and R3 - Dale, Panasonic 10kΩ, 1/10W, SMT REV. 1.3.5 5/21/02 ILC6363 PRODUCT SPECIFICATION Typical Performance Characteristics ILC6363CIR-ADJ Unless otherwise specified: TA = 25°C, CIN = 100µF, COUT = 100µF, L = 15µH, VOUT = 3.6V Efficiency vs Output Current (PFM Mode) Efficiency vs Input Voltage (PFM Mode) 100 VIN=3.4V VIN=3.2V VIN=3V VIN=2.8V Efficiency (%) Efficiency (%) 95 90 VIN=3.8V 85 VIN=3.6V VIN=4V 80 75 VIN=4.2V 0 30 20 IOUT (mA) 10 40 50 Efficiency vs Output Current (PWM Mode) 100 90 VIN=3.6V 85 VIN=3.8V 80 75 VIN=4.0V 300 200 IOUT (mA) 100 400 IOUT=3mA VOUT=(nom)=3.6V 3.2 3.4 3.6 VIN (V) 3.8 4.0 4.2 VIN=4.0V VIN=4.2V 3.5 VOUT (V) VOUT (V) 3.0 3.6 IOUT=300mA 3.4 IOUT=50mA IOUT=400mA IOUT=200mA IOUT=500mA 3.0 2.8 VIN=2.8V 3.4 3.3 3.2 3.1 10 IOUT=500mA Load Regulation 3.7 3.5 3.2 IOUT=400mA 86 78 2.8 500 3.6 3.3 IOUT=200mA 90 IOUT=50mA Line Regulation 3.7 IOUT=100mA 82 VIN=4.2V 0 4.2 94 Efficiency (%) Efficiency (%) VIN=2.8V 4.0 Efficiency vs Input Voltage (PWM Mode) 98 VIN=3.4V VIN=3.2V VIN=3.0V 95 98 IOUT=40mA 96 IOUT=50mA IOUT=10mA 94 92 90 IOUT=5mA 88 86 IOUT=20mA 84 82 80 78 2.8 3.0 3.2 3.4 3.6 3.8 VIN (V) 3.1 3.0 3.2 3.4 3.6 VIN (V) 3.8 4.0 4.2 3.0 0 VIN=3.8V VIN=3.6V VIN=3.4V VIN=3.2V VIN=3.0V 50 100 150 200 250 300 350 400 450 500 IOUT (mA) REV. 1.3.5 5/21/02 PRODUCT SPECIFICATION ILC6363 Typical Performance Characteristics ILC6363CIR-ADJ Unless otherwise specified: TA = 25°C, CIN = 100µF, COUT = 100µF, L = 15µH, VOUT = 3.6V Output Ripple Voltage vs Input Voltage Ripple Current vs Input Voltage 160 IOUT=500mA 140 120 100 IOUT=400mA IOUT=0mA, 10mA 80 IOUT=100mA 60 IOUT=0mA, 10mA 50mA 40 20 0 2.8 3.2 3.4 3.6 VIN (V) 3.8 4.0 120 100 80 IOUT=100mA IOUT=100mA IOUT=50mA 20 0 2.8 IOUT=200mA 3.0 3.2 3.4 3.6 VIN (V) 3.8 4.0 4.2 Line Transient Response VIN(mV) 4.6 4.2 VOUT(mV) VOUT(V) IOUT=10mA 40 4.2 IOUT=500mA IOUT=0mA 60 VIN vs VOUT 3.8 IOUT=250mA 3.6 3.4 IOUT=400mA 140 IOUT=200mA IOUT=50mA 3.0 Ripple Current (mApp) Output Ripple (mVpp) 160 3.8 2.8 +50 0 -50 IOUT=500mA 2.8 3.4 4.0 VIN (V) 4.6 5.2 500µs/div PFM Mode Load Switching Waveform Inductor Current Inductor Current VOUT AC Coupled VOUT AC Coupled PWM Mode Load Switching Waveform 1µs/div REV. 1.3.5 5/21/02 250µs/div 11 ILC6363 PRODUCT SPECIFICATION Typical Performance Characteristics ILC6363CIR-ADJ Unless otherwise specified: TA = 25°C, CIN = 100µF, COUT = 100µF, L = 15µH, VOUT = 3.6V (nominal) Low Battery Output (VIN < VTH for Greater than 100ms) 10kΩ pull-up resistor from LBO to 3V supply VOUT vs Temperature 3.7 VOUT=3.6V (nominal) 4 VIN=2.8V, ILOAD=200mA VIN=4.2V, ILOAD=500mA VIN=3.6V, ILOAD=200mA 3.5 VIN=4.2V, ILOAD=500mA 3 2 VIN=1.2V IOUT=40mA 1 0 VIN=3.0V, ILOAD=500mA VIN (V) VOUT (V) 3.6 LBO (V) VIN=4.2V, ILOAD=200mA 3.4 VIN=2.8V, ILOAD=500mA 3.3 -40 -30 -20-10 0 10 20 30 40 50 60 70 80 90 Temperature °C 1.5 1.0 0.5 0 20ms/div→ Low Battery Output (VIN < VTH for Less than 100ms) 10kΩ pull-up resistor from LBO to 3V supply 3 2 1 VIN=1.2V IOUT=40mA VIN (V) 0 1.5 1.0 0.5 0 Spectral Noise Plot Output Noise Voltage (mVrms) LBO (V) 4 20ms/div→ 3.00 2.40 VIN=2.8V IOUT=68mA 1.80 Fundamental: 345kHz/2.7mVrms 1.20 0.60 0 100 First Harmonic 690kHz/0.66mVrms 1k 10k 100k Freq (Hz) 1M Output Noise Voltage (dBVrms) Spectral Noise Plot 12 -42 -62 VIN=2.8V IOUT=66mA -82 345kHz IF Band:2.6µVrms -102 -122 -142 255k 335k 415k 495k Freq (Hz) 575k 655k REV. 1.3.5 5/21/02 PRODUCT SPECIFICATION ILC6363 Mechanical Dimensions 8 Lead MSOP 0.122 (3.1) 0.114 (2.9) Pin 1 identifier 0.122 (3.1) 0.114 (2.9) 0.244 (5.15) 0.228 (4.65) 0.025 (.65)BSC 0.043 (1.1) 0.031 (.80) 0.016 (.40) 0.01 (.25) REV. 1.3.5 5/21/02 0.006 (.15) 0.004 (.05) 0.009 (.23) 0.005 (.13) (0-10)° 0.027 (.70) 0.016 (.40) 13 ILC6363 PRODUCT SPECIFICATION Ordering Information for Ta = -40°C to +85°C, MSOP-8 Package Part Number ILC6363CIR50X ILC6363CIRADJX Output Voltage 5.0 Adjustable DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used 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 (c) whose 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 of the user. 2. A critical component in 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. www.fairchildsemi.com 5/21/02 0.0m 003 Stock#DS30006363 2002 Fairchild Semiconductor Corporation