ILC6383

ILC6383 FAIRCHILD | Alldatasheet

Document overview

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Technical content

Features

• Guaranteed start up in PWM at 0.9V input
• Synchronous rectification requires no external diode
• True load disconnect from battery input in shutdown
• Up to 75mA at 3.3V and 40mA at 5V from 1V input
• Up to 375mA at 3.3V and 300mA at 5V from 3V input
• Peak efficiency > 90%
• 1µA battery input current in shutdown (with V OUT = 0V)
• Internal Oscillator frequency: 300kHz to ±15%
• ILC6383: Fixed 3.3V or 5V output
• ILC6383-ADJ: Adjustable output to 6V maximum
• Low battery detector with 100ms transient rejection delay
• Powergood output flag when V OUT is in regulation

Applications

• Cellular Phones, Pagers
• Palmtops, PDAs and portable electronics
• High efficiency 1V step up converters

Description

The ILC6383 series of step-up DC-DC converters operate from 1-cell to 3-cell input. They are direct replacement for ILC6382, 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 input voltage higher than 1.5V and loads below 100mA, while PWM is recom- mended for more than 50mA load current and in noise sensi- tive applications. In shutdown mode, the device allows true load disconnect from battery input. Designed for wireless communications applications, the oscillator frequency is set at 300kHz with no harmonics at sub 20kHz audio band or at 455kHz IF band. Internal synchronous rectification and externally selectable PFM/PWM mode of operation allows the selection of the best efficiency at light or full load. The ILC6383 is capable of delivering 75mA at 3.3V output from a single cell input. The ILC6383-XX offers 3.3V or 5V fixed output voltage while the ILC6383-ADJ allows adjustable output voltage to 6V maximum. Output voltage accuracy is ±3.5% over full operating temperature range. Additional features include power good output (POK ) and an internal low battery detector with 100ms transient rejection delay. The device will reject low battery input transients under 100ms in duration. The ILC6383 series is available in a space saving eight lead micro SOP (MSOP-8) package. ILC6383 1-Cell to 3-Cell Boost DC-DC Converter with True Load Disconnect, 3.3V, 5V or Adjustable Output 47µF ON OFF VIN 1 to 3-cell R5 15µH L COUT ILC6383-ADJ MSOP-8 LX VIN LBI/SD SEL GND LBO VFB VOUT VOUT VOUT = 1.25 (1+R1/R2) CIN 47µF ILC6383-XX LX VIN LBI/SD SEL GND LBO POK VOUT ON OFF VIN 1 to 3-cell R5 15µH MSOP-8 L VOUT47µF COUT Low Battery Detector Output Power Good Output CIN PWM PFM PWM PFM 47µF Figure 1. ILC6383CIR-XX Figure 2. ILC6383CIR-ADJ

ILC6383 PRODUCT SPECIFICATION REV. 1.2.6 6/13/02 Pin Assignments Pin Definitions Absolute Maximum Ratings (Note 1) Pin Number Pin Number Pin Description X Inductor input . Inductor L connected between this pin and the battery IN 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

. 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.

5 POK

(ILC6383CIR-XX) Power Good Output . This open drain output pin will go high when output voltage is within regulation, 0.92*V OUT(NOM) < V threshold < 0.98*V OUT(NOM) V FB (ILC6383CIR-ADJ) 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.

6 LBO

This open drain output will go low if the battery voltage is below the low battery threshold set at pin 3

7 GND

. Connect this pin to the battery and system ground OUT Regulated output voltage Parameter Symbol Ratings Units Voltage on V OUT pin V OUT -0.3 to 7 V Voltage on LBI, Sync, LBO, POK, V FB , L X and V IN pins - -0.3 to 7 V Peak switch current on L X pin IL X Current on LBO pin I SINK(LBO) 5 mA Continuous total power dissipation at 85˚C P D 315 mW Short circuit current I SC Internally protected (1 sec. duration) A Operating ambient temperature T A -40 to 85 °C Maximum junction temperature T J(MAX) 150 °C Storage temperature T stg -40 to 125 °C Lead temperature (soldering 10 sec.) 300 °C Package thermal resistance θ JA 206 °C/W MSOP (TOP VIEW) ILC6383CIR-XX SEL LB/SD VIN LX 1 4 5

8 VOUT

(TOP VIEW) ILC6383CIR-ADJ LX VIN VOUT

PRODUCT SPECIFICATION ILC6383 REV. 1.2.6 6/13/02 (SEL in LOW State) Unless otherwise specified, all limits are at V IN = V LBI = 2.0V, I OUT = 1mA and T A = 25°C, test circuit Figure 1. BOLDFACE type indicates limit that apply over the full operating temperature range. (Note 2) (SEL Open) Unless otherwise specified, all limits are at V IN = V LBI = 2.0V, I OUT = 50mA and T A = 25°C, test circuit Figure 1. BOLDFACE type indicates limit that apply over the full operating temperature range. (Note 2) (SEL in LOW State) Unless otherwise specified, all limits are at V IN = V LBI = 2.4V, I OUT = 1mA and T A = 25°C, test circuit Figure 1. BOLDFACE type indicates limit that apply over the full operating temperature range. (Note 2) Parameter Symbol Conditions Min. Typ. Max. Units Output Voltage V OUT(nom) 1.5V < V IN < 2.4V, 1.5V < V IN < 2.4V 3.217 3.184 3.3 3.382 3.415 V Maximum Output Current I OUT V OUT 0.96V OUT(nom) , 150 mA Load Regulation ∆∆∆∆ V OUT V OUT 1mA < I OUT < 20mA 1 % No Load Battery Input Current I IN (no load) I OUT = 0mA, V IN LBI =1.2V 250 µA Efficiency η I OUT = 20mA 88 % Parameter Symbol Conditions Min. Typ. Max. Units Output Voltage V OUT 1.5V < V IN < 2.4V, 1.5V < V IN < 2.4V 3.217 3.184 3.3 3.382 3.415 V Maximum Output Current I OUT V IN = 1.2V, V OUT 0.96V OUT(nom) V IN = 2.0V, V OUT 0.96V OUT(nom) V IN = 2.4V, V OUT 0.96V OUT(nom) V IN = 3.0V, V OUT 0.96V OUT(nom) 150 200 375 mA Load Regulation ∆∆∆∆ V OUT V OUT 50mA < I OUT < 100mA 1 % Efficiency η I OUT = 50mA 90 % Parameter Symbol Conditions Min. Typ. Max. Units Output Voltage V OUT(nom) 1.5V < V IN < 3V, 1.5V < V IN < 3V 4.875 4.825 5.0 5.125 5.175 V Maximum Output Current IOUT VOUT ≥ 0.96VOUT(nom) 150 mA Load Regulation ∆∆∆∆VOUT VOUT 1mA < IOUT < 20mA 1 % No Load Battery Input Current IIN (no load) IOUT = 0mA, VIN=VLBI=1.5V 550 µA Efficiency η IOUT = 20mA 90 %

ILC6383 PRODUCT SPECIFICATION 4 REV. 1.2.6 6/13/02 Unless otherwise specified, all limits are at VIN = VLBI = 2.4V, IOUT = 50mA and TA = 25°C, test circuit Figure 1. BOLDFACE type indicates limit that apply over the full operating temperature range. (Note 2) General Electrical Characteristics Unless otherwise specified, all limits are at VIN = VLBI = 2.4V and TA = 25°C, test circuit figure 1 and figure 2 for. ILC6383CIR-XX and ILC6383CIR-ADJ respectively. (Note 2) Parameter Symbol Conditions Min. Typ. Max. Units Output Voltage V OUT 1.5V < VIN < 3V, 1.5V < VIN < 3V 4.875 4.825 5.0 5.125 5.175 V Maximum Output Current IOUT VIN = 1.2V, VOUT ≥ 0.96VOUT(nom) VIN = 2.0V, VOUT ≥ 0.96VOUT(nom) VIN = 2.4V, VOUT ≥ 0.96VOUT(nom) VIN = 3.0V, VOUT ≥ 0.96VOUT(nom) 150 200 300 mA Load Regulation ∆∆∆∆V OUT VOUT 1mA < IOUT < 50mA 1 % Efficiency η IOUT = 50mA 90 % Parameter Symbol Conditions Min. Typ. Max. Units LBO Output Voltage Low VLBO(low) ISINK = 2mA, open drain output, VLBI = 1V 0.4 V LBO Output Leakage Current ILBO(hi) VLBO = 5V 1 2 µA Shutdown Input Voltage Low VSD(low) 0.4 V Shutdown Input Voltage High VSD(hi) 16 V SEL Input Voltage High VSEL(hi) 1.5 V SEL Input Voltage Low VSEL(low) 0.4 V POK Output Voltage Low VPOK(low) ISINK = 2mA, open drain output 0.4 V POK Output Voltage High VPOK(hi) 6 V POK Output Leakage Current IL(POK) 6V at pin 5 2 µA POK Threshold V TH(POK) 0.92 x VOUT 0.95 x VOUT 0.98 x VOUT V POK Hysteresis V HYST 50 mV Feedback Voltage (ILC6383CIR-ADJ only) V FB 1.225 1.212 1.250 1.275 1.288 V Output Voltage Adjustment Range (ILC6383CIR-ADJ only) V OUT(ADJ) min VOUT(ADJ) max VIN = 0.9V, IOUT = 50mA VIN = 3V, IOUT = 50 mA 2.5V V Minimum Startup Voltage VIN(start) IOUT = 10mA, PWM mode 0.9 1 V

PRODUCT SPECIFICATION ILC6383 REV. 1.2.6 6/13/02 5 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 (t HOLD(LBI)). This feature eliminates false triggering due to voltage transients at the battery terminal. Input Voltage Range V IN VOUT = VOUT(nominal) ± 4% IOUT = 10mA 0.9 VOUT(nominal) +0.5V V Battery Input Current in Load Disconnect Mode I IN(SD) VLBI/SD < 0.4V, VOUT = 0V (short circuit) 1 10 µA Switch on resistance R ds(on) N-Channel MOSFET P-Channel MOSFET 400 750 mΩ Oscillator Frequency f OSC 255 300 345 kHz LBI Input Threshold V REF 1.175 1.150 1.250 1.325 1.350 Input Leakage Current I LEAK Pins LB/SD , SEL and VFB, (Note 3) 200 nA LBI Hold Time t HOLD(LBI) (Note 4) 100 120 mS Parameter Symbol Conditions Min. Typ. Max. Units General Electrical Characteristics (continued)

across R6. A typical value for R6 is 100kΩ. high frequency switching currents. Figure 6. Low Battery Detector The circuitry for this is shown in Figure 7. Figure 7. VLBI < 1.25V formula across R2. A typical value for R2 is 100kΩ.

2 VIN

Figure 8. Shut Down Control within the regulation tolerance of the set output voltage. some other system voltage source. where VFB is the threshold set which is 1.25V nominal. Figure 9. Adjustable Voltage Configuration Figure 10. Negative Output Voltage

PRODUCT SPECIFICATION ILC6383 REV. 1.2.6 6/13/02 9 External Component Selection Inductors The ILC6383 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. Capacitors Input Capacitor The input capacitor is necessary to minimize the peak current drawn from the battery. Typically a 10µF 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 ILC6383 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 charac- teristics are met with ceramic capacitors, but may also be met with certain types of tantalum capacitors. Suitable vendors are shown in Table 2. Layout and Grounding Considerations High frequency switching and large peak currents means PCB design for DC-DC converters requires careful consider- ation. As a general rule, place the DC-DC converter circuitry well away from any sensitive RF or analog compo- nents. 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. Layout 1. Place all power components, ILC6383, inductor, input capacitor and output capacitor as close together as possible. 2. Keep the output capacitor as close to the ILC6383 as possible with very short traces to the V OUT and GND pins. Typically it should be within 0.25 inches or 6mm. 3. Keep the traces for the power components wide, typically >50mil or 1.25mm. 4. Place the external networks for LBI and V FB close to the ILC6383, but away from the power components as far as possible. Grounding 1. 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 ILC6383 and connect back to a quiet ground plane using vias. Recommended application circuit schematic for ILC6383CIR-ADJ Vendor Part No. Contact Coilcraft D03308P-153 D03316P-153 D01608C-153 (847) 639-6400 muRata LQH4N150K LQH3C150K (814) 237-1431 Sumida CDR74B-150MC CD43-150 CD54-150 (847) 956-0666 TDK NLC453232T-150K (847) 390-4373 Description Vendor Contact T495 series tantalum Kemet (864) 963-6300 595D series tantalum Sprague (603) 224-1961 TAJ, TPS series tantalum AVX (803) 946-0690 X5R, X7R Ceramic TDK (847) 390-4373 AVX (803) 946-0690 muRata www.murata.com 47µF VIN 15µH COUT 47µF ILC6383 LX VIN LBI/SD SEL GND LBO VFB VOUT VOUT CIN LoadON/OFF Local "Quiet" Ground Power Ground PWM PFM

ILC6383 PRODUCT SPECIFICATION 10 REV. 1.2.6 6/13/02 Evaluation Board Parts List For Printed Circuit Board Shown Above Label Part Number Manufacturer Description U1 ILC6383CIR-ADJ Fairchild Semiconductor Step-up DC-DC converter C GRM43-2X5R476K6.3 muRata 47µF , ceramic capacitor L1 LQS66C150M04 muRata 15µH, 1.3A R1 and R2 — Dale, Panasonic User Determined Values R3 — Dale, Panasonic 10k Ω, 1/10W, SMT Label Part Number Manufacturer Description U1 ILC6383CIR-XX Fairchild Semiconductor Step-up DC-DC converter C GRM43-2X5R476K6.3 muRata 47µF , ceramic capacitor L1 LQS66CA150M04 muRata 15µH, 1.3A R1 and R3 — Dale, Panasonic 10k Ω, 1/10W, SMT 47µF VIN 15µH 47µF ILC6383XX LX VIN LBI SEL GND LBO POK/VFB VOUT VOUT1 ON LBO POK 10K 10K OFF SEL GND PWM PFM 47µF VIN 15µH 47µF ILC6383ADJ LX VIN LBI SEL GND LBO POK/VFB VOUT VOUT1 ON LBO VFB 10K OFF SEL GND PWM PFM NOTE: R1 and R2 are user determined values to set VOUT = VFB(1+R1/R2) R1+R2 ≤ 100KΩ

ILC6383 PRODUCT SPECIFICATION 11 REV. 1.2.6 6/13/02 Typical Performance Characteristics ILC6383CIR-33 (VOUT = 3.3 V) Unless otherwise specified: TA = 25°C, CIN = 47µF , COUT = 47µF , L = 15µH. Efficiency (PWM Mode) 0.6 0.7 0.8 0.9 30 50 100 150 200 250 300 350 400 VIN = 2V VIN = 1.5V VIN = 2.5V Efficiency Load Current (mA) 3.2 3.22 3.24 3.26 3.28 3.3 3.32 3.34 3.36 1 5 10 15 20 25 Load Regulation (PFM Mode) Load Current (mA) Output Voltage (V) VIN = 3V VIN = 2V VIN = 1.5V 1.9 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 11 02 03 04 05 0 Start-up Input Voltage vs Output current in PFM Load Current (mA) Start-up Input Voltage (V) 0.9 0.85 0.8 0.75 0.7 0.65 1 5 10 15 20 25 30 Load Current (mA) Efficiency Efficiency (PFM Mode) VIN = 2.5V VIN = 2VVIN = 1.5V 40035030025020015010050 Load Regulation (PWM Mode) Output Voltage (V) Load Current (mA) VIN = 2.5V VIN = 2VVIN = 1.5V 3.42 3.4 3.38 3.36 3.34 3.32 3.3 3.28 3.26 3.24 3.22 3.2 3.18

ILC6383 PRODUCT SPECIFICATION 12 REV. 1.2.6 6/13/02 Typical Performance Characteristics ILC6383CIR-50 (VOUT = 5.0 V) Unless otherwise specified: TA = 25°C, CIN = 47µF , COUT = 47µF , L = 15µH. Efficiency (PWM Mode) Load Regulation (PWM Mode) Efficiency %

PRODUCT SPECIFICATION ILC6383 REV. 1.2.6 6/13/02 13 Typical Performance Characteristics ILC6383CIR-50 (VOUT = 5.0V) (Continued) Unless otherwise specified: TA = 25°C, CIN = 47µF , COUT = 47µF , L = 15µH.

ILC6383 PRODUCT SPECIFICATION 14 REV. 1.2.6 6/13/02 Mechanical Dimensions 8-Lead MSOP Pin 1 identifier 0.122 (3.1) 0.114 (2.9) (0-10) ° 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) 0.006 (.15) 0.01 (.25) 0.009 (.23) 0.005 (.13) 0.027 (.70) 0.016 (.40)

ILC6383 PRODUCT SPECIFICATION 6/13/02 0.0m 003 Stock#DS30006383 2002 Fairchild Semiconductor Corporation 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 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. Ordering Information for Ta = -40°C to +85°C, MSOP-8 Package Part Number Output Voltage ILC6383CIR33X 3.3V ILC6383CIR50X 5.0V ILC6383CIRADJX Adjustable