LP3910SQX-AN

LP3910SQ-AN Power Management IC for Hard Drive Based Portable Media Players August 20, 2009 LP3910SQ-AN Power Management IC for Hard Drive Based Portable Media Players General Description The LP3910SQ-AN is a programmable system power management unit that is optimized for HDD-based Portable Media Players. The LP3910SQ-AN incorporates 2 low-dropout LDO voltage regulators, 2 integrated Buck DC/DC converters with Dynamic Voltage Scaling (DVS), 1 wide load range Buck-Boost DC/ DC converter with programmable output voltage, a 4-channel 8-bit A/D converter and a dual source Li-Ion/polymer battery charger. The charger has the capability to charge and maintain a single cell battery from a regulated wall adapter or USB power. When both USB and adapter sources are present, then the adapter source takes precedence and switching between USB and adapter power sources is seamless. In addition, the battery charger supports power routing, which allows system usage immediately after an external power source has been detected. The LP3910SQ-AN also incorporates some advanced battery management functions such as battery temperature measurement, reverse current blocking for USB, LED charger status indication, thermally regulated internal power FETs, battery voltage monitoring, over-current protection and a 10 hour safety timer. The Buck-Boost DC/DC converter targets the power management of Hard Disk Drives and maintains a typical operating voltage of 3.3V ±5% with a battery voltage below or above this output level. The Buck-Boost output voltage can be selected to be as low as 1.8V. The 4-channel A/D converter measures the battery voltage and charge current, which can be used for fuel gauging. Two undedicated channels can be used to measure other analog parameters such as discharge current, battery temperature, keyboard resistor scanning and more. The various IC parameters are programmable through a 400 kHz I2C compatible interface. The LP3910SQ-AN is available in a thermally-enhanced 6x6x0.8 mm 48–pin LLP package and operates over an ambient temperature range of –40°C to +85°C. Features ■ 2 low-dropout regulators -- LDO1 is used for general purpose applications, LDO2 is used for low-noise analog applications. Both LDOs have programmable output voltages. Green and Red LED charger status drivers 4-channel 8-bit dual slope a/d converter 2 High-efficiency DVS Buck converters Wide load range Buck-Boost DC/DC converter 400 kHz I2C compatible interface Linear constant-current / constant-voltage charger for single cell lithium-ion batteries USB and Adapter charging System power supply management 6x6x0.8mm 48–pin LLP package Voltage and thermal supervisory circuits Continuous battery voltage monitoring Interrupt Request output with 8 sources ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Key Specifications ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ LDO1: 150 mA, 1.2V–3.3V LDO2: 150 mA, 1.3V–3.3V BUCK1: 600 mA, 0.8V–2.0V BUCK2: 600 mA, 1.8V–3.3V BUCK-Boost: 1000 mA, 1.8V–3.3V 50 mΩ battery path resistance 100 mA–1000 mA full-rate charge current using wall adapter Selectable 0.05C and 0.1C EOC current USB current limit of 100 mA, 500 mA, and 800 mA USB pre-qual current of 50 mA Selectable 4.1V, 4.2V or 4.38V battery termination voltages 0.35% battery termination accuracy ±1 LSB INL/DNL on 8-bit a/d converter Applications ■ Hard drive-based media players ■ Portable gaming players ■ Portable navigation devices © 2009 National Semiconductor Corporation 301012 www.national.com LP3910SQ-AN Typical Application Circuit 30101201 FIGURE 1. Application Diagram www.national.com 2 LP3910SQ-AN Connection Diagram Device Connection Diagram 30101202 48–pin LLP Package (Top View) SQF48A The physical placement of the package marking will vary from part to part. (*) UZXYTT format: ‘U’ – wafer fab code; ‘Z’ – assembly code; ‘XY’ 2 digit date code; ‘TT’ – die run code See http://www.national.com/quality/marking_conventions.html for more information on marking information. Ordering Information Order Number LP3910SQ-AN LP3910SQX-AN Package Type 48-lead LLP 48-lead LLP NSC Package Drawing SQF48A SQF48A Top Mark 3910-AN 3910-AN Supplied As 250 tape & reel 2500 tape & reel Device Default Options Order Number LP3910SQ-AN LP3910SQX-AN LDO1 1.2V 1.2V LDO2 2.5V 2.5V BUCK1 1.0V 1.0V BUCK2 1.8V 1.8V BUCK-Boost 3.3V 3.3V ICHRG 1000 mA 1000 mA 3 www.national.com LP3910SQ-AN Pin Descriptions Name TS VBATT1 AGND VREFH LDO2EN VLDO2 VIN1 VLDO1 POWERACK ISENSE I/O I O G O I O I O I I Type A A G A D A PWR A D A Functional Description Battery temperature sense pin. This pin is normally connected to the thermistor pin of the battery cell. Positive battery terminal. This pin must be externally shorted to VBATT2 and VBATT3 Analog Ground Connection to bypass capacitor for internal high reference Digital input to enable/disable LDO2 LDO2 Output Power input to LDO1 and LDO2. VIN1 pin must be externally shorted to the VDD pins. LDO1 Output Digital power acknowledgement input (see Power Sequencing) A 4.64 kΩ resistor must be connected between this pin and GND. A fraction of the charge current flows through this resistor to enable the A to D converter to measure the charge current. Channel 2 input to AD converter Channel 1 input to AD converter Open drain active low interrupt request Open drain active low reset during Standby This output indicates that a valid charger supply source (USB adapter) has been detected, and the IC is charging. (Red LED) Battery Status output indicator - Off during CC, 50% duty cycle during CV, 100% duty cycle with a fully charged Li-ion battery (Green LED) Digital input to enable/disable BUCK1 BUCK1 Feedback input terminal BUCK1 Ground BUCK1 Output Power input to BUCK1. VIN2 pin must be externally shorted to the VDD pins. Power input to BUCK2. VIN3 pin must be externally shorted to the VDD pins. BUCK2 Output BUCK2 Ground BUCK2 Feedback input terminal Power ON/OFF pin configured either as level (High or Low) triggered or edge (High or Low) triggered. I2C compatible interface clock terminal Supply to input / output stages of digital I/O I2C compatible interface data terminal Open Drain output that reflects the debounced state of ONOFF pin. Buck/Boost Feedback input terminal Buck/Boost Output voltage Buck/Boost inductor Buck/Boost high current ground Buck/Boost inductor Power input to Buck/Boost. VIN4 pin must be externally shorted to the VDD pins. This pin needs to be pulled high during USB suspend mode. Pulling this pin low limits the USB charge current to 100 mA. Pulling this pin high limits the USB charge current to 500 mA. Buck/Boost Core Ground Digital ground Pin # 1 2 3 4 5 6 7 8 9 10 ADC2 ADC1 IRQB NRST CHG STAT BUCK1EN VFB1 BCKGND1 VBUCK1 VIN2 VIN3 VBUCK2 BCKGND2 VFB2 ONOFF I2C_SCL VDDIO I2C_SDA ONSTAT VBBFB VBBOUT VBBL2 BBGND1 VBBL1 VIN4 USBSUSP USBISEL BBGND2 DGND I I O O O O I I G O I I O G I I I I I/O O I O I G I I I I G G A A Open Drain Open Drain D D D A G A PWR PWR A G A D D D D Open Drain A A A G A PWR D D G G 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 www.national.com 4 LP3910SQ-AN Name VDD3 VDD2 VBATT3 VBATT2 USBPWR VDD1 CHG_DET IREF I/O I I O O I I I I Type PWR PWR A A PWR PWR A A Functional Description Power input to supply application. This pin must be externally shorted to VDD1 and VDD2. Power input to supply application This pin must be externally shorted to VDD1 and VDD3. Positive battery terminal. This pin must be externally shorted to V\BATT1 and VBATT2. Positive battery terminal. This pin must be externally shorted to VBATT1 and VBATT3. USB power input pin Power input to supply application This pin is shorted to VDD2 and VDD3. Wall adapter power input pin A 121 kΩ resistor must be connected between this pin and AGND. The resistor value determines the reference current for the internal bias generator. Pin # 41 42 43 44 45 46 47 48 5 www.national.com LP3910SQ-AN Absolute Maximum Ratings (Notes 1, 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply voltage range CHG_DET −0.3V to +6.5V Voltage range USBPWR, VIN1,VIN2,VIN3,VIN4, VDD1,VDD2,VDD3 −0.3V to +6.2V Battery voltage range VBATT1, 2, 3 −0.3V to +5V All other pins −0.3V to VDD +0.3V Storage Temperature Range −45ºC to +150ºC Power Dissipation (TA = 70°C (Note 3)): 2.6W ESD Rating (Note 4) Human Body Model: 2.0 kV Machine Model: 200V Operating Ratings (Notes 6, 7, 10) 4.5V to 6.0V 4.35V to 6.0V 0V to 4.5V 2.5V to 6.0V 2.5V to VDD −40°C to +125°C −40°C to +85°C 1.6W CHG_DET USBPWR VBATT1, 2, 3 VIN1, VIN2, VIN3, VIN4, VDD1, VDD2, VDD3 VDDIO Junction Temperature (TJ) Range Ambient Temperature (TA) Range Power Dissipation for TJjMAX and TAMAX Thermal Information Junction-to-Ambient Thermal Resistance (θJA), 48-pin LLP SQF48A Package (Note 7) 25°C/W Electrical Characteristics General Electrical Characteristics Unless otherwise noted, VDD = 5V, VBATT = 3.6V. Typical values and limits appearing in normal type apply for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, TJ = 0°C to +125°C. (Notes 2, 7, 8, 9) Symbol IQ_BATT Parameter Battery Standby Supply Current Conditions All circuits off except for POR and battery monitor. No adapter or USB power connected. VDD Falling Edge Min Typ 6 1.9 160 20 115 2.5 2 VDD Max 20 Units µA V °C °C °C V MHz VPOR TSD TSDH TTH-ALERT VDDIO FCLK Power-On Reset Threshold Thermal Shutdown Threshold Themal Shutdown Hysteresis Thermal Interrupt Threshold IO Supply Internal System Clock Frequency I2C Interface Electrical Characteristics Unless otherwise noted, VDDIO = 3.6V. Typical values and limits appearing in normal type apply for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, TJ = 0°C to +125°C. (Notes 2, 7, 8, 9) Symbol VIL VIH VOL VHYS FCLK tBF tHOLD tCLK-LP tCLK-HP tSU tDATA-HOLD tDATA-SU Parameter Low Level Input Voltage High Level Input Voltage Low Level Output Voltage Schmitt Trigger Input Hysterisis Clock Frequency Bus-Free Time between START and STOP Hold Time Repeated START Condition CLK Low Period CLK High Period Set-up Time Repeated START Condition Data Hold Time Data Set-up Time (Note 9) (Note 9) (Note 9) (Note 9) (Note 9) (Note 9) (Note 9) 1.3 0.6 1.3 0.6 0.6 0 100 Conditions I2C_SDA I2C_SCL I2C_SDA & I2C_SCL I2C_SDA & I2C_SCL I2C_SDA & I2C_SCL 0.7VDDIO 0 0.1VDDIO 400 0.2VDDIO & Min Typ Max 0.3VDDIO Units V V V V kHz µs µs µs µs µs µs ns www.national.com 6 LP3910SQ-AN Symbol tSU tTRANS Parameter Set-Up Time for STOP Condition Maximum Pulse Width of Spikes That Must Be Suppressed by the Input Filter of Both Data and CLK Signals. Conditions (Note 9) (Note 9) Min 0.6 50 Typ Max Units µs µs Li-Ion Battery Charger Electrical Characteristics Unless otherwise noted, VDD = 5.0V, VBATT = 3.6V, CBATT = 4.7 µF, CCHG_DET = 10 µF, RIREF = 121 kΩ. Typical values and limits appearing in normal type apply for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, TJ = 0°C to +125°C. (Notes 2, 6, 7, 8, 10) Symbol VUSB VUSB_HYST CHG_DET VCHG_HYST IUSB_SUSP Parameter Minimum External USB Supply Soltage USBPWR Detect Hysteresis Minimum External Adapter Supply Voltage Range CHG_DET Input Hysteresis Quiescent Current in USB Suspend Mode USB Suspend Mode, VUSB = 5.0V USBSUSP = USBPWR USBISEL = 0V TA = 25°C, IPROG = 500 mA ICHG = 50 mA TA = 0°C to 125°C, IPROG = 500 mA, ICHG = 50 mA ICHG_WA Full-rate Charging Current from Wall Adapter Input (See Full-rate Charging Mode Description) CHG_DET = 5.25V VBATT = 3.6V IPROG = 500 mA -0.35 −0.5 −0.5 −1 −1.5 −1.5 450 Adapter Current Limit = 1A VFWD Schottky = 350 mV 4.4 Conditions USB Current Limit = 500 mA Min 4.15 Typ 4.25 110 4.5 150 4.6 Max 4.35 Units V mV V mV 30 60 µA VTERM_TOL Battery Charge Termination Voltage Tolerance 4.2V 4.1V 4.38V 4.2V 4.1V 4.38V 500 +0.35 +0.5 +0.5 +1 +1.5 +1.5 550 % mA ICHG_USB Full-rate Charging Current from USB = 5V USBPWR Input (See Full-rate Charging VBATT = 3.6V Mode Description) IPROG = 500 mA USB_ISEL = 800 mA USB = 5V VBATT = 3.6V IPROG = 500 mA USB_ISEL = 500 mA 450 500 550 mA 405 450 495 mA USB ILIMIT USB_ISEL = 100 mA USB_ISEL= 500 mA USB_ISEL = 800 mA Pre-qualification Current VBATT = 2.5V, Wall Adapter Charge Current. Percentage of Programmed Full Rate Current. VBATT = 2.5V, USB Charge Current 90 450 720 95 475 760 100 500 800 mA % IPREQUAL 8 10 12 40 2.75 1.955 50 2.85 1.995 0.365 0.310 60 2.95 2.035 0.385 0.330 mA V V V VFULL_RATE VTH_H VTH_L Full-rate Qualification Threshold Upper TS Comparator Limit Lower TS Comparator Limit VBATT Rising, Transition from PreQualification to Full-rate Charging 45°C CHSPV Reg D3 = 0 50°C CHSPV Reg D3 = 1 0.345 0.290 7 www.national.com LP3910SQ-AN Symbol ITSENSE TREG Parameter Battery Temperature Sense Current Regulated Charger Junction Temperature Conditions Min 72.5 105 Typ 75 115 Max 77.5 125 Units µA °C Detection and Timing Symbol IEOC Parameter End-of-Charge Current Conditions IPROG = 500 mA, 10% EOC Setting IPROG = 500 mA 5% EOC Setting VRESTARTl Battery Restart Charging Voltage VTERM = 4.1V VTERM = 4.2V VTERM = 4.38V Min 40 20 3.82 3.94 4.14 28 28 8 8 4 4 8 28 28 8 8 8 4 17 9 0.9 Typ 50 25 3.9V 4.0V 4.2 V 32 32 10 10 5 5 10 32 32 10 10 10 5 2 21 10 1 25 11 1.1 Max 60 30 3.94 4.06 4.26 36 36 12 12 6 6 12 36 36 12 12 12 6 Units mA mA V ms ms ms ms ms ms ms ms ms ms ms ms ms ms min hours hour TCHG_IN TUSB TPQ_FULL TFULL_PQ TBATTLOWF TBATTLOWR TBATTEMP TONOFF_F TONOFF_R TRESTART TCCCV TCvEOC TPOWERACK TTSHD TTOPOFF T10HR T1HR Deglitch Adapter Insertion Deglitch USB Power Insertion Deglitch Time for Pre-qualification to Fullrate Charge Transition Deglitch Time for Full-rate to Prequalification Transition Deglitch Time for VBATT Falling below VBATTLOW Threshold Deglitch Time for VBATT Rising above VBATTLOW Threshold Deglitch Time for Recovery from Battery Temperature Fault Deglitching on Falling Edge of ONOFF Pin Deglitching on Rising Edge of ONOFF Pin Deglitching on Falling VBATT Crossing VRESTART Deglitching of CC->CV Charging Transition Deglitching of CV->EOC (End of Charge) Deglitching of POWERACK Pin Deglitching of Thermal Shutdown Topoff Timer 10 Hour Safety Timer 1 Hour Prequal Safety Timer Outputs Electrical Characteristics: CHG, STAT Unless otherwise noted, VDD = 5V, VBATT = 3.6V. CBATT = 4.7 µF, CCHG_DET = 10 µF. Typical values and limits appearing in normal type apply for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, TJ = 0°C to +125°C. (Notes 2, 6, 7, 8, 10) Symbol ILED ILED ILEAKAGE LEDFREQ www.national.com Parameter Output High Level Output High Level Leakage Current Blinking Frequency 8 Conditions VLED = 2.0V CHSPV Register (02)h bit 5 = 1 VLED = 2.0V CHSPV Register (02)h bit 5 = 0 VLED = 1.5V, LED off Min 4 8 Typ 5 10 0.1 Max 6 12 5 1.2 Units mA mA µA Hz 0.8 1 LP3910SQ-AN Outputs Electrical Characteristics: NRST, IRQB, ONSTAT Unless otherwise noted, VDD = 5V, VBATT = 3.6V. CBATT = 4.7 µF, CCHG_DET = 10 µF. Typical values and limits appearing in normal type apply for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, TJ = 0°C to +125°C. (Notes 2, 6, 7, 8, 10) Symbol VOL ILEAKAGE Parameter Output Low Level Leakage Current IOL = 4 mA VDD = 2.5V, Output Logic High −1 Conditions Min Typ Max 0.4 1 Units V µA Inputs Electrical Characteristics: USBSUSP, USBISEL Unless otherwise noted, VUSB = 5V, VBATT = 3.6V. CBATT = 4.7 µF, CCHG_DET = 10 µF. Typical values and limits appearing in normal type apply for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, TJ = 0°C to +125°C. (Notes 2, 6, 7, 8, 10) Symbol VIL VIH ILEAKAGE Parameter Input Low Level Input High Level Input Leakage 0.7*VUSB −1 1 Conditions Min Typ Max 0.3*VUSB Units V V µA Inputs Electrical Characteristics: POWERACK, ONOFF, LDO2EN, BUCK1EN Unless otherwise noted, VDD = 5V, VBATT = 3.6V. CBATT = 4.7 µF, CCHG_IN = 10 µF. Typical values and limits appearing in normal type apply for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, TJ = 0°C to +125°C. (Notes 2, 6, 7, 8, 10) Symbol VIL VIH ILEAKAGE Parameter Input Low Level Input High Level Input Leakage 1.4 −1 1 Conditions Min Typ Max 0.4 Units V V µA LDO1: Low Drop Out Linear Regulators Unless otherwise noted, VIN1 = 3.6V, IMAX = 150 mA, VOUT = Default Value, CVDD = 10 µF, CLDO1 = 1.0 µF, ESR = 5 mΩ–500 mΩ, CVREFH = 100 nF. Typical values and limits appearing in normal type apply for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, 0°C to +125°C. Symbol VIN1 VOUT Range VOUT Accuracy ΔVOUT Parameter Operational Voltage Range Output Voltage Programming Range Output Voltage Accuracy TA = 25°C 1.2V–3.3V in 100 mV Steps 1 mA ≤ IOUT ≤ IMAX, Over Full Line and Load Regulation. VOUT = Default Value. VIN = (VOUT + 500 mV) to 5.5V, Load Current = IMAX VIN = 3.6V, Load Current = 1 mA to IMAX VOUT = 0V Load Current = IMAX F = 10 kHz, Load Current = IMAX LDO Disabled, VOUT = Default Value 600 Conditions Min 2.5 1.2 Typ Max 6.0 3.3 Units V V −3 3 % Line Regulation Load Regulation 3 10 750 60 30 200 150 mV mV mA mV dB Ω ISC VIN – VOUT PSRR RSHUNT Short Circuit Current Limit Dropout Voltage Power Supply Ripple Rejection LDO Output Impedance 9 www.national.com LP3910SQ-AN LDO2: Low Drop Out Linear Regulator Unless otherwise noted VIN1 = 3.6V, IMAX = 150 mA, VOUT = Default Value, CVDD = 10 µF, CLDO2 = 1.0 µF, ESR = 5 mΩ– 500 mΩ, CVREFH = 100 nF. Typical values and limits appearing in normal type apply for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, 0°C to +125°C. Symbol VIN2 VOUT Range VOUT Accuracy ΔVOUT Parameter Operational Voltage Range Output Voltage Programming Range Output Voltage Accuracy (Default VOUT) Line Regulation Load Regulation ISC VIN – VOUT PSRR eN RSHUNT Short Circuit Current Limit Dropout Voltage Power Supply Ripple Rejection Analog Supply Output Noise Voltage LDO Output Impedance TA = 25°C 1.3V–3.3V in 100 mV Steps 1 mA ≤ IOUT ≤ IMAX, Over Full Line and Load Regulation. VIN = (VOUT + 500 mV) to 5.5V, Load Current = IMAX VIN = 3.6V, Load Current = 1 mA to IMAX VOUT = 0V Load Current = IMAX F = 1 kHz, Load Current = IMAX F = 10 kHz, Load Current = IMAX 10 Hz < F < 100 kHz LDO Disabled, VOUT = Default Value 600 Conditions Min 2.5 1.3 −3 3 10 750 60 50 35 50 200 150 Typ Max 6.0 3.3 3 Units V V % mV mV mA mV dB µVrms Ω BUCK1 Converter Electrical Characteristics Unless otherwise noted, VIN2 = 3.6 V, VOUT = default value, CVIN2 = 10 µF, CSW1 = 10 µF, LSW1 = 2.2 µH Typical values and limits appearing in normal type apply for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, 0°C to +125°C. Modulation mode is PWM mode with automatic switch to PFM at light loads. Symbol VIN2 VOUT Range ΔVOUT Input Voltage Output Voltage Programming Range Static Output Voltage Tolerance Line Regulation Load Regulation IOUT IPFM IQ FOSC η TON Continuous Output Current Peak Output Current Limit Max ILOAD, PFM Mode Quiescent Current Internal Oscillator Frequency Peak Efficiency Turn-on Time To 95% Level (Note 9) IOUT = 0 mA BUCK1 Disabled PWM Mode 2 90 1 0.80V–2.00V in 50 mV Steps IOUT = 200 mA, Including Line and Load Regulation IOUT = 10 mA VIN2 = 2.5V − VDD 100 mA < IOUT < 300 mA 600 850 1000 75 30 90 1 1150 Parameter Conditions Min 2.7 0.8 −3 0.2 0.002 Typ Max 6.0 2.0 3 Units V V % %/V %/mA mA mA mA µA MHz % ms www.national.com 10 LP3910SQ-AN BUCK2 Converter Electrical Characteristics Unless otherwise noted, VIN3 = 3.6V, VOUT = default value, CVIN3 = 10 µF, CSW1 = 10 µF, LSW2 = 2.2 µH Typical values and limits appearing in normal type apply for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, 0°C to +125°C. Modulation mode is PWM mode with automatic switch to PFM at light loads. Symbol VIN3 VOUT Range ΔVOUT Input Voltage Output Voltage Programming Range Static Output Voltage Tolerance Line Regulation Load Regulation IOUT IPFM IQ FOSC η TON Continuous Output Current Peak Output Current Limit Max ILOAD, PFM Mode Quiescent Current Internal Oscillator Frequency Peak Efficiency Turn-on Time To 95% Level (Note 9) IOUT = 0 mA BUCK2 Disabled PWM Mode 2 90 1 1.80V–3.30V in 100 mV Steps IOUT = 200 mA, Including Line and Load Regulation IOUT = 10 mA VIN3 = 2.5V − VDD 100 mA < IOUT < 300 mA 600 850 1000 75 30 90 1 1150 Parameter Conditions Min 2.7 1.8 −3 0.2 0.002 Typ Max 6.0 3.3 3 Units V V % %/V %/mA mA mA mA µA MHz % ms BUCK–BOOST Electrical Characteristics Unless otherwise noted, VIN4 = 3.6V, CVIN4 = 10 µF, CBB = 22 µF, LBB = 2.2 µH Typical values and limits appearing in normal type apply for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, 0°C to +125° C. Modulation mode is PWM mode with automatic switch to PFM at light loads. Symbol VIN4 VOUT Range ΔVOUT Input Voltage Output Voltage Programming Range Static Output Voltage Tolerance Line Regulation Load Regulation IOUT Continuous Output Current Peak Inductor Current Limit IPFM IQ FOSC η TON Max ILOAD, PFM Mode Quiescent Current Internal Oscillator Frequency Peak Efficiency Turn-on Time To 95% Level (Note 9) IOUT = 0 mA PFM No Switching BUCK-Boost Disabled PWM Mode 2 93 1 VOUT = 3.3V 1A Load at VIN = 2.7V Parameter Conditions IOUTMAX = 1000 mA IOUTMAX = 800 mA 1.80V – 3.30V in 50 mV Steps IOUT = 0 mA–1000 mA, Including Line and Load Regulation IOUT = 10 mA 100 mA < IOUT < 1000 mA 1000 1800 75 80 1 2400 Min 2.9 2.7 1.8 −4 0.2 0.0016 Typ Max 5.7 5.7 3.3 4 Units V V V % %/V %/mA mA mA mA µA MHz % ms 11 www.national.com LP3910SQ-AN ADC Electrical Characteristics External components: Symbol VREF INL DNL VGP_IN VBATT, RANGE 0 Parameter Reference Voltage Core ADC Integral Non-linearity Core ADC Differential Non-linearity General Purpose ADC Input Voltage Range Battery Max Voltage Scalar Output Battery Min Voltage Scalar Output Battery Max Voltage Scalar Output Battery Min Voltage Scalar Output ISENSE Max Voltage Scalar Output T = 25°C Conditions T = 0°C to +125°C VREF = 1.225 (Note 9) VREF = 1.225 (Note 9) Min 1.220 1.200 -1 -0.5 VREF Typ 1.225 1.225 Max 1.230 1.230 1 0.5 2·VREF Units V V LSB LSB V V V V V V VBATT = 3.5V VBATT = 2.6V VBATT = 4.4V VREF = 2.6V VISENSE = 0.6463V (ICHG = 0.605A, RSENSE = 4.64 kΩ) VISENSE = 0V (ICHG = 0A, RSENSE = 4.64 kΩ) VISENSE = 1.175V (ICHG = 1.1A, RSENSE = 4.64 kΩ) VISENSE = 0V (ICHG = 0A, RSENSE = 4.64 kΩ) 2.435 1.217 2.435 1.217 2.373 2.45 1.225 2.45 1.225 2.45 2.465 1.232 2.465 1.232 2.519 VBATT, RANGE 1 VISENSE RANGE 0 ISENSE Min Voltage Scalar Output 1.186 1.225 1.260 V VISENSE ISENSE Max Voltage Scalar Output 2.373 2.45 2.519 V RANGE 1 ISENSE Min Voltage Scalar Output 1.186 1.218 2.436 1.225 1.225 2.45 1.260 1.230 2.46 5 V V V ms ms ADC1 & ADC2 MIN ADC1 & ADC2MAX tCONV tWARM ADC1 & ADC2 Min Voltage Scalar Output VREFH = 1.225 ADC1 & ADC2 Max Voltage Scalar Output Conversion Time Warm-up Time VREFH = 1.225 (Note 9) 2 Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under which operation of the device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see the Electrical Characteristics tables. Note 2: All voltages are with respect to the potential at the GND pin. Note 3: Internal thermal shutdown circuitry protects the device from permanent damage. Thermal shutdown engages at TJ = 160°C (typ.) and disengages at TJ = 140°C (typ.). Note 4: The Human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin. The machine model is a 200 pF capacitor discharged directly into each pin. MIL-STD-883 3015.7. Note 5: In applications where high power dissipation and/or poor package thermal resistance is present, the maximum ambient temperature may have to be derated. Maximum ambient temperature (TA-MAX) is dependent on the maximum operating junction temperature (TJ-MAX-OP = 125°C), the maximum power dissipation of the device in the application (PD-MAX), and the junction-to-ambient thermal resistance of the part/package in the application (θJA), as given by the following equation: TA-MAX = TJ-MAX-OP − (θJA × PD-MAX). Note 6: Junction-to-ambient thermal resistance is highly application and board-layout dependent. In applications where high maximum power dissipation exists, special care must be paid to thermal dissipation issues in board design. Note 7: Min and Max limits are guaranteed by design, test, or statistical analysis. Typical numbers are not guaranteed, but do represent the most likely norm. Note 8: Low ESR Surface-Mount Ceramic Capacitors (MLCCs) are used in setting electrical characteristics. Note 9: Specifications guaranteed by design. Not tested during production. Note 10: Typical values and limits appearing in normal type for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, −40°C to +125°C. Note 11: LDO2EN, BUCK1EN, and USBSUSP have weak internal pull downs while pins POWERACK, ONOFF do not have this. www.national.com 12 LP3910SQ-AN Typical Performance Characteristics -- Battery Charger TA = 25°C unless otherwise noted Vterm 4.2V vs. Temperature TS Pin Current vs. Temperature 30101296 30101297 TS Pin Current vs. CHG_DET ICHG vs. VBATT CHG_DET = 5.0V, CC 30101298 30101299 ICHG vs. VBATT CHG_DET = 5.0V, Prequal IPROG = 500mA ICHG vs. USBPWR VBATT = 2.5V, Prequal 30101240 30101239 13 www.national.com LP3910SQ-AN ICHG vs. CHG_DET VBATT = 3.5V, CC ICHG vs. Temperature CHG_DET = 5V, VBATT = 3.75V, CC 30101241 30101242 ICHG vs. Temperature CHG_DET = 5V, VBATT = 2.5V, Prequal Thermal Regulation of Charge Current 30101244 30101243 USB ILIMIT vs. Temperature 30101245 www.national.com 14 LP3910SQ-AN Wall Adapter Insertion with USBPWR present CH1 = Charge Current (mA); CH3 = CHG_DET (V); CH4 = USBPWR (V) Wall Adapter Removal with USBPWR present CH1 = Charge Current (mA); CH3 = CHG_DET(V); CH4 = USBPWR (V) 301012100 301012101 15 www.national.com LP3910SQ-AN Typical Performance Characteristics -- LDO TA = 25°C unless otherwise noted Output Voltage Change vs Temperature (LDO1) Vin = 4.3V, Vout = 3.3V, 100 mA load Output Voltage Change vs Temperature (LDO2) Vin = 4.3V, Vout = 1.8V, 100 mA load 30101246 30101247 Load Transient (LDO1) 3.6 Vin, 3.3 Vout, 0 – 100 mA load Load Transient (LDO2) 3.6 Vin, 1.8 Vout, 0 – 100 mA load 30101248 30101249 Line Transient (LDO1) 3.6 - 4.5 Vin, 3.3 Vout, 150 mA load Line Transient (LDO2) 3 – 4.2 Vin, 1.8 Vout, 150 mA load 30101250 30101251 www.national.com 16 LP3910SQ-AN Enable Start-up time (LDO1) 0-3.6 Vin, 3.3 Vout, 1mA load Enable Start-up time (LDO2) 0 – 3.6 Vin, 1.8 Vout, 1 mA load 30101252 30101253 17 www.national.com LP3910SQ-AN Typical Performance Characteristics — BUCK TA = 25°C unless otherwise noted Output Voltage vs. Supply Voltage (Vout = 3.3 V) Output Voltage vs. Supply Voltage (Vout = 2.0 V) 30101254 30101255 Output Voltage vs. Supply Voltage (Vout = 1.2V) Output Voltage vs. Supply Voltage (Vout = 0.8V) 30101256 30101257 www.national.com 18 LP3910SQ-AN BUCK 1 Efficiency vs Output Current (Forced PWM Mode, Vout =1.2V, L= 2.2µH) BUCK 1 Efficiency vs Output Current (Forced PWM Mode, Vout =2.0V, L= 2.2µH) 30101258 30101259 BUCK 1 Efficiency vs Output Current (PFM to PWM mode, Vout =1.2V, L= 2.2µH) BUCK 1 Efficiency vs Output Current (PFM to PWM mode, Vout =2.0V, L= 2.2µH) 30101260 30101261 BUCK 2 Efficiency vs Output Current (Forced PWM Mode, Vout =1.8V, L= 2.2µH) BUCK 2 Efficiency vs Output Current (Forced PWM Mode, Vout =3.3V, L= 2.2µH) 30101262 30101263 19 www.national.com LP3910SQ-AN BUCK 2 Efficiency vs Output Current (PFM to PWM Mode, Vout =1.8V, L= 2.2µH) BUCK 2 Efficiency vs Output Current (PFM to PWM Mode, Vout =3.3V, L= 2.2µH) 30101264 30101265 BUCK 1 Load Transient Response VIN = 4.2V, VOUT = 1.2V, ILOAD = 200-400mA (PWM Mode) BUCK 1 Load Transient Response VIN = 4.2V, VOUT = 1.2V ILOAD = 50-150mA (PFM to PWM) 30101266 30101267 BUCK 2 Load Transient Response VIN = 4.2V, VOUT = 3.3V ILOAD = 200-400mA (PWM Mode) BUCK 2 Load Transient Response VIN = 4.2V, VOUT = 3.3V ILOAD = 50-150mA (PFM to PWM) 30101268 30101269 www.national.com 20 LP3910SQ-AN Line Transient Response Vin = 3 – 3.6 V, Vout = 1.2 V, 250 mA load Line Transient Response Vin = 3 – 3.6 V, Vout = 3.3 V, 250 mA load 30101270 30101271 Start up into PWM Mode Vout = 1.8 V, 30 mA load Start up into PWM Mode Vout = 3.3 V, 30 mA load 30101272 30101273 Start up into PFM Mode Vout = 1.8 V, 30 mA load Start up into PFM Mode Vout = 3.3 V, 30 mA load 30101274 30101275 21 www.national.com LP3910SQ-AN Typical Performance Characteristics — BUCK-Boost TA = 25°C unless otherwise noted Efficiency vs. VIN ILOAD = 100mA Forced PWM Efficiency vs ILOAD VOUT = 3.3V 30101277 30101276 AutoMode Efficiency vs. ILOAD VOUT = 3.3V AutoMode Efficiency vs. ILOAD VOUT = 1.8V 30101278 30101279 www.national.com 22 LP3910SQ-AN Switch Pins in BUCK Mode Operation VIN = 4.2V, VOUT =3.3V, ILOAD = 250mA Switch Pin on Edge of BUCK Mode Operation VIN = 3.6V, VOUT =3.3V, ILOAD = 250mA 30101280 30101281 Switch Pin on Edge of Boost Mode Operation VIN = 3.35V, VOUT =3.3V, ILOAD = 250mA Switch Pins in Boost Mode Operation VIN = 3.2V, VOUT =3.3V, ILOAD = 250mA 30101282 30101283 Load Transient, BUCK Response VIN = 4.2V, VOUT = 3.3V, ILOAD = 0-500mA Load Transient, Edge of BUCK Response VIN = 3.6V, VOUT = 3.3V, ILOAD = 0-500mA 30101284 30101285 23 www.national.com LP3910SQ-AN Load Transient, Boost Response VIN = 2.7V, VOUT = 3.3V, ILOAD = 0-500mA Line Transient, Boost Response VIN = 3V - 3.6V VOUT = 3.3V, ILOAD = 500mA 30101286 30101287 www.national.com 24 LP3910SQ-AN Functional Description OPERATING MODES The LP3910SQ-AN can be in 3 different operating modes as illustrated in the following Operating Mode State Diagram: 30101203 State Machine Definitions: VBLA Battery low alarm threshold VBATT Battery voltage WA Wall Adapter USB ONOFF POWERACK Universal Serial Bus Adapter On off pin event Acknowledgment from the Host Processor 25 www.national.com LP3910SQ-AN Voltage Threshold Levels 30101204 www.national.com 26 LP3910SQ-AN Power State Table Power Off LDO1,2 BUCK1,2 BUCK/BOOST CHARGER A/D Converter NRST I2C interface Internal System Oscillator Battery Monitor Current consumption Off Off Off Off Off Low Off Off Off