MP3416GJ-P

MP3416 Step-UpConverter with Low IQ, 1.1A Switching Current,Output Disconnect and Battery Detection Feature DESCRIPTION FEATURES The MP3416 is a low quiescent current, step-up converterthat uses peak-currentcontrol and variable frequency architecture to regulate the output voltage. The MP3416 can work with an input voltage as low as 0.86Vto provide an output voltage from 1.8V to 5.5V.       The MP3416 works in peak-current-control modeand provides good transient response. The integrated P-channel synchronous rectifier improves efficiency and eliminates the need for an external Schottky diode. In light-load condition, the peak current declines to about 350mA, and the device enters pulseskip mode to save power loss. When the MP3416 shuts down, the output is disconnected from the input, allowing the output to draw less than 0.65µA in shutdown mode. The MP3416 is available in 8-pin TSOT23 and 8pin QFN (1.5mmx2.0mm) packages.       Input Voltage Range: 0.86V to 5.5V Start-Up Voltage Range:1.25V to 5.5V Output Voltage Range: 1.8V to 5.5V 9.5μA Quiescent Current VOUT Adjustable Low Battery Detection Internal Synchronous Rectifier Over-Temperature Protection(OTP) withThermal Shutdown at 155°C Available in TSOT23-8 and QFN-8 (1.5mmx2.0mm) Packages APPLICATIONS       Medical Devices Digital Retail Displays Gaming Controllers Remote Controllers Battery-Powered Products Handheld Computers and Smart Phones All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For MPS green status, please visit the MPS website under Quality Assurance.“MPS” and “The Future of Analog IC Technology” are registered trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION L1 3.3μH SW VIN IN C1 10μF MP3416 Rev.1.0 12/14/2016 R4 348kΩ EN VOUT, 3.3V OUT MP3416 R1 1MΩ C2 FB 22μF LBI R5 100kΩ GND LBO R2 178kΩ www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2016 MPS. All Rights Reserved. 1 MP3416 –1.1A SWITCHING CURRENT, LOW IQSTEP-UP CONVERTER ORDERING INFORMATION Part Number MP3416GJ* MP3416GQH** Package TSOT23-8 QFN-8 (1.5mmx2.0mm) Top Marking See Below See Below * For Tape & Reel, add suffix–Z(e.g. MP3416GJ–Z) ** For Tape & Reel, add suffix–Z(e.g. MP3416GQH–Z) TOP MARKING (MP3416GJ) AHT: Product code of MP3416GJ Y: Year code TOP MARKING (MP3416GQH) FK: Product code of MP3416GQH LL:Lot number PACKAGE REFERENCE MP3416 Rev.1.0 12/14/2016 TOP VIEW TOP VIEW TSOT23-8 QFN-8 (1.5mmx2.0mm) www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2016 MPS. All Rights Reserved. 2 MP3416 –1.1A SWITCHING CURRENT, LOW IQSTEP-UP CONVERTER ABSOLUTE MAXIMUM RATINGS (1) Thermal Resistance (4) SW ...................... -0.3V to+6.5V (8.5V for 0.7V) turns on the regulator; logic low(VOUT) The MP3416 integrates one disconnection MOSFET (DIS-FET) for down-mode condition. WhenVIN is lower than VOUT-0.2V, the DIS-FET is on and does not differ from a normal converter’s operation. While VIN rises higher, the gate of the DIS-FET is connected to a voltage level of VIN0.4V. In this condition, the SW voltage is charged high by the inductor current.The DIS-FET no longer acts as a low-impedance path,but only turns on when the SW voltage is charged high by the inductor current. If the inductor current is zero, the SW voltage is equal to VIN, so the DISFET does not turn on. In shutdown, the LS-FET never turns on to setup the inductor current, so the DIS-FET can disconnect the output terminal from the input to prevent battery discharge. Start-Up There are three steps for start-up. Firstly,after the input voltage rises up to the minimum startup voltage,the MP3416enters open-loop work mode. In this mode, the switching ontime is constant, and the output voltage is charged high by increasing the switching frequency. When VOUTrises to about 1.7V, the MP3416 switches to close-loop work mode with soft-start control. In this second stage, the inductor peak current is controlled by the internal COMP voltage (VCOMP),andthe minimum peak current is not limited, so the switching frequency may be high, and the rising output voltage has a very small voltage ripple. Finally, when the output voltage is close to its set value, the MP3416 enters BCM close-loop mode, whilethe minimum peak inductor current is limited above 350mA.Due to the 350mA minimum peak current, the MP3416 may enter pulse-skipmode in steady state if the load is light.The loop is powered by the input before VOUTrises up to 1.7V.It is then powered by the output after VOUT is higher than 1.7V. Enable Control (EN) The device operates when EN is high (>0.7V). In shutdown mode with a low EN voltage, the regulator stops switching and halts all internal control circuitry, and the DIS-FET turns off as well. This isolates the load from the input, so the output voltage can drop below the input voltage during shutdown. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2016 MPS. All Rights Reserved. 12 MP3416 –1.1A SWITCHING CURRENT, LOW IQSTEP-UP CONVERTER Current Limit The MP3416 usescurrent limit to prevent aninductor current runaway. If the inductor current triggersthe current limit, the LS-FET is turned off immediately. When the load current increases, the inductor current triggersthe limit level and limits the output energy. To prevent the LS-FET from running away, the max turn on time is limited to 10µs. Short-Circuit and Overload Protection Unlike most step-up converters, the MP3416 allows for short circuits on the output. In the event of a short circuit, the MP3416 enters hiccup protection.During an overload, VOUT may drop to about 1.6V.If the load continues increasing, the MP3416 enters hiccup protection. If overload is defined as VOUT higher than 1.6V but still smaller than VIN+0.2V,the MP3416 treatsthis as down mode operation with current limit.The internal temperature of the MP3416 may rise,causing the device to enter OTP. MP3416 Rev.1.0 12/14/2016 Low Battery Detection The MP3416 includes one LBI pin to detect the battery voltage, andthe function is active only when the device is enabled. LBI is connected to VIN through the externalresistor divider. If the LBI voltage is lower than 0.4V, LBO goes low to indicate the power failure. During application, the LBI voltage should always be higher than 0.2V;otherwise, the LBO function may indicate falsely. Thermal Protection The device has an internal temperature monitor. If the die temperature exceeds 155°C, the part stop working and restartswhen the die temperature drops below 135°C. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2016 MPS. All Rights Reserved. 13 MP3416 –1.1A SWITCHING CURRENT, LOW IQSTEP-UP CONVERTER APPLICATION INFORMATION Setting the Output Voltage The external resistor divider sets the output voltage (see the Typical Application schematic on page 1). The feedback resistor (R1) must account for both stability and dynamic response and should therefore be chosen carefully. Choose R1, and then calculate R2with Equation (1): R2  VFB  R1 VOUT  VFB (1) Where VFB=0.504V. The feedback circuit is shown in Figure 2. VOUT MP3416 FB R2 Figure 2: Feedback Network Table 1 lists the recommended resistor values for common output voltages. Table 1: Resistor Values for Common Output Voltages R1(kΩ) 1000 1000 1000 1000 R2(kΩ) 383 200 178 113 Input Capacitor Selection Low ESR input capacitors reduce input switching noise and peak current drawn from the battery. Ceramic capacitors are recommended for input decoupling and should be located as close to the deviceas possible. A ceramic capacitor 10μF or larger is recommended to restrain the VIN ripple. MP3416 Rev.1.0 12/14/2016 Considering the efficiency and output ripple, a 1.5μH to 3.3μH inductor is recommended for most applications. The inductor should have a low DCR to reduce resistive power loss. The saturated current (ISAT) should be large enough to support the peak current. Output Capacitor Selection R1 VOUT(V) 1.8 3 3.3 5 Inductor Selection The MP3416 can apply small surface-mounted chip inductors due to the 1.1A peak current. Because of the peak current and boundary conduction mode (BCM) control method, the values of the inductance affect the switching frequency. A larger inductance causes lower switching frequency and increases output ripple.A smaller inductance causes higher switching frequency and decreases efficiency. The output capacitor requires a minimum capacitance value of 22μF at the programmed output voltage to ensure stability over the full operating range. A higher capacitance value may be required to lower the output ripple and transient response. Low ESR capacitors such as X5R or X7R type ceramic capacitors are recommended. Supposing that ESR is zero, the minimum output capacitor to support the ripple in the boost mode can be calculated with Equation (2): Co  Io  ( V OUT (MAX )  VIN(MIN ) ) VOUT (MAX )  V  fS(MIN ) (2) WhereVOUT(MAX)is the maximum output voltage, VIN(MIN) is the minimum input voltage, IOis the output current, fS(MIN)is the minimum switching frequency, and ∆V is theacceptable output ripple. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2016 MPS. All Rights Reserved. 14 MP3416 –1.1A SWITCHING CURRENT, LOW IQSTEP-UP CONVERTER PCB Layout Considerations Efficient PCB layout is critical for switching power supplies with a high switching frequency. A poor layout can result in reduced performance, EMI problems, resistive loss, and system instability. For best results, refer to Figure 3 and Figure 4 and follow the guidelines below. Bottom Layer SW Vout 1) Place the output capacitor as close to OUT and GND as possible. 2) Place the input capacitor and inductor close to the IC. 3) Keep the SW trace as short and wide as possible. 4) Keep the feedback loop far away from noise sources, such as the SW trace. 5) Keep the feedback divider resistor as close to FB and GND as possible. 6) Tie the ground return of the input/output capacitor close to GND witha large GND copper area. 7) Add GND and vias on the bottom layer if the top layer GND connection between CIN, COUT, and IC-GND is narrow. Bottom Layer L Top Layer L Top Layer Vin C2 GND R1 OUT IN SW EN GND LBI FB LBO C1 GND R2 Figure 4:Recommended QFN Layout Design Example Table 2is a design example following the application guidelines for the following specifications. Table 2: Design Example VIN VOUT IOUT 1.25V to 5.5 V 3.3V 0A-0.1A(7) The typical application circuit for VOUT = 3.3V in Figure 5 shows the detailed application schematic and is the basis for the typical performance waveforms. For more detailed device applications, please refer to the related evaluation board datasheets. NOTE: 7) the load capability is higher when VIN is relatively high, refer to the Maximum Output Current vs. Input Voltage curveon page 8. SW Vout Vin IN C1 OUT EN SW LBI GND LBO FB C2 GND GND R2 R1 Figure 3:Recommended TSOT23 Layout MP3416 Rev.1.0 12/14/2016 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2016 MPS. All Rights Reserved. 15 MP3416 –1.1A SWITCHING CURRENT, LOW IQSTEP-UP CONVERTER TYPICAL APPLICATION CIRCUITS L1 VOUT, 3.3V 3.3µH R3 100kΩ IN EN GND LBI R5 100kΩ GND OUT MP3416 GND R4 200kΩ C1 10µF SW VIN R1 1MΩ R6 100kΩ C2 22µF FB GND LBO R2 178kΩ GND GND Figure 5: Typical Schematic for 3.3V Output L1 VOUT, 5V 3.3µH R4 200kΩ R3 100kΩ IN EN GND LBI R5 100kΩ GND OUT MP3416 GND C1 10µF SW VIN GND R1 1MΩ R6 100kΩ C2 22µF FB GND LBO R2 113kΩ GND Figure 6: Typical Schematic for 5V Output MP3416 Rev.1.0 12/14/2016 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2016 MPS. All Rights Reserved. 16 MP3416 –1.1A SWITCHING CURRENT, LOW IQSTEP-UP CONVERTER PACKAGE INFORMATION TSOT23-8 MP3416 Rev.1.0 12/14/2016 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2016 MPS. All Rights Reserved. 17 MP3416 –1.1A SWITCHING CURRENT, LOW IQSTEP-UP CONVERTER PACKAGE INFORMATION(continued) QFN-8 (1.5mmx2.0mm) PIN 1 ID 0.125X45º TYP PIN 1 ID MARKING PIN 1 ID INDEX AREA BOTTOM VIEW TOP VIEW SIDE VIEW NOTE: 0.125 X 45° 1) ALL DIMENSIONS ARE IN MILLIMETERS. 2) EXPOSED PADDLE SIZE DOES NOT INCLUDE MOLD FLASH. 3) LEAD COPLANARITY SHALL BE 0.10 MILLIMETERS MAX. 4) JEDEC REFERENCE IS MO-220. 5) DRAWING IS NOT TO SCALE. RECOMMENDED LAND PATTERN NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. MP3416 Rev.1.0 12/14/2016 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2016 MPS. 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