MPM3804 MPS | Alldatasheet
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Technical content
0.6A, 5.5V Input Step-Down Module Synchronous Regulator with Integrated Inductor in Ultra-Small 2x2x0.9mm QFN Package MPM3804 Rev.1.0 www.MonolithicPower.com 1 5/2/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved.
DESCRIPTION
The MP M3804 is a monolithic , step-down, switch-mode converter with built-in, internal power MOSFETs and an inductor. The MPM3804 achieves 0.6A of continuous output current from a 2. 3V to 5.5V input voltage range with excellent load and line reg ulation. The output voltage can be regulated as low as 0.6V. Only input capacitors, output capacitors , and feedback (FB) resistors are required to complete the design. The constant-on-time (COT) control scheme provides a fast transient response , high lightload efficiency, and easy loop stabilization. Full protection features include cyclebycycle current limiting and thermal shutdown. The MPM3804 is ideal for a wide range of applications, including high -performance DSPs, wireless power, portable and mobi le devices, and other low-power systems. The MPM3804 requires a minim al number of readily available , standard, external components and is available in an ultra -small QFN-10 (2mmx2mm) package.
FEATURES
Up to 91% Peak Efficiency Low IQ: 11μA Wide 2.3V to 5.5V Operating Input Range Output Voltage as Low as 0.6V 100% Duty Cycle in Dropout 0.6A Output Current 120mΩ and 80mΩ Internal Power MOSFETs 2.4MHz Frequency EN and Power Good for Power Sequencing Cycle-by-Cycle Over-Current Protection (OCP) 0.5ms Internal Soft-Start Time Output Discharge Short-Circuit Protection (SCP) with Hiccup Mode Thermal Shutdown Stable with Low ESR Output Ceramic Capacitors Ultra-Small 2mm x 2mm x 0.9mm QFN-10 Package
APPLICATIONS
Optical Modules Industrial Products IOT Devices Space Constrained Applications Low-Voltage I/O Supplies LDO Replacement 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 200kΩ GND VIN OUT EN FB 10µF VIN 2.3V to 5.5V VOUT 1.2V/0.6A MPM3804 EN 200kΩ 22µF
MPM3804 – 0.6A, 5.5V INPUT STEP-DOWN MODULE SYNCHRONOUS REGULATOR WITH INTEGRATED INDUCTOR IN ULTRA-SMALL 2X2X0.9MM QFN PACKAGE MPM3804 Rev.1.0 www.MonolithicPower.com 2 5/2/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved.
ORDERING INFORMATION
Part Number Package Top Marking MPM3804GG* QFN-10 (2mmx2mm) See Below MPM3804GG-12 MPM3804GG-15 MPM3804GG-18 MPM3804GG-25 MPM3804GG-33** * FOR TAPE & REEL, ADD SUFFIX –Z (E.G. MPM3804GG–Z) ** For fixed output options, please contact the factory (the fixed output versions have not been released yet). TOP MARKING DL: Product code of MPM3804GG Y: Year code LLL: Lot number PACKAGE REFERENCE TOP VIEW TOP VIEW 1VIN 2SW 3SW 4SW FB OUT OUT OUT EN GND 1VIN 2SW 3SW 4SW PG OUT OUT OUT EN GND MPM3804GG MPM3804GG-12 MPM3804GG-15 MPM3804GG-18 MPM3804GG-25 MPM3804GG-33 QFN-10 (2mmx2mm)
MPM3804 – 0.6A, 5.5V INPUT STEP-DOWN MODULE SYNCHRONOUS REGULATOR WITH INTEGRATED INDUCTOR IN ULTRA-SMALL 2X2X0.9MM QFN PACKAGE MPM3804 Rev.1.0 www.MonolithicPower.com 3 5/2/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. ABSOLUTE MAXIMUM RATINGS (1) 6V (8V for <10ns or 10V for <3ns) Continuous power dissipation (TA = +25°C) (2) Recommended Operating Conditions (3) Operating junction temp. (TJ). .. -40°C to +125°C Thermal Resistance (4) θJA θJC NOTES: 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the maximum junction temperature T J (MAX), the junction -to- ambient thermal resistance θ JA, and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by P D (MAX) = (T J (MAX)-TA)/θJA. Exceeding the maximum allowable power dissipation produces an excessive die temperature, causing the regulator to go into thermal shutdown. Internal thermal shutdown cir cuitry protects the device from permanent damage. 3) The device is not guaranteed to function outside of its operating conditions. 4) Measured on JESD51-7, 4-layer PCB.
MPM3804 – 0.6A, 5.5V INPUT STEP-DOWN MODULE SYNCHRONOUS REGULATOR WITH INTEGRATED INDUCTOR IN ULTRA-SMALL 2X2X0.9MM QFN PACKAGE MPM3804 Rev.1.0 www.MonolithicPower.com 4 5/2/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
VIN = 3.6V, TJ = -40°C to +125°C, typical value is tested at T J = +25°C. The limit over temperature is guaranteed by characterization, unless otherwise noted. Parameter Symbol Condition Min Typ Max Units Feedback voltage VFB 2.3V ≤ VIN ≤ 5.5V, TJ = 25°C 0.594 0.600 0.606 V Feedback current IFB VFB = 0.65V 50 100 nA P-FET switch on resistance RDSON_P 120 mΩ N-FET switch on resistance RDSON_N 80 mΩ Dropout resistance RDR 100% on duty 440 mΩ Switch leakage VEN = 0V, VIN = 6V, VSW = 0V, TJ = 25°C 0 1 μA P-FET peak current limit 1 1.3 1.6 A N-FET valley current limit 0.4 A Switching frequency fs VOUT = 1.2V 1920 2400 2910 kHz TJ = -40°C to +85°C(6) 1800 2400 3000 kHz Minimum off time TMIN-OFF 60 ns Minimum on time(5) TMIN-ON 60 ns Soft-start time TSS-ON 0.5 ms Under-voltage lockout threshold rising 2 2.25 V Under-voltage lockout threshold hysteresis 150 mV EN input logic-low voltage 0.4 V EN input logic-high voltage 1.2 V EN input current VEN = 2V 1.2 μA VEN = 0V 0 μA Supply current (shutdown) VEN = 0V, TJ = 25°C 0 1 μA Supply current (quiescent) VEN = 2V, VIN = 3.6V, 5V, VFB = 0.63V, TJ = 25°C 11 15 μA Thermal shutdown(6) 160 °C Thermal hysteresis(6) 30 °C Output discharge resistor RDIS VEN = 0V, VOUT = 1.2V 1 kΩ Output inductor L Test frequency = 1MHz 1 μH DCR 0.24 0.32 0.4 Ω NOTES: 5) Guaranteed by characterization. 6) Guaranteed by design.
MPM3804 – 0.6A, 5.5V INPUT STEP-DOWN MODULE SYNCHRONOUS REGULATOR WITH INTEGRATED INDUCTOR IN ULTRA-SMALL 2X2X0.9MM QFN PACKAGE MPM3804 Rev.1.0 www.MonolithicPower.com 5 5/2/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS VIN = 5V, VOUT = 1.2V, COUT = 22μF, TA = +25°C, unless otherwise noted.
MPM3804 – 0.6A, 5.5V INPUT STEP-DOWN MODULE SYNCHRONOUS REGULATOR WITH INTEGRATED INDUCTOR IN ULTRA-SMALL 2X2X0.9MM QFN PACKAGE MPM3804 Rev.1.0 www.MonolithicPower.com 6 5/2/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 5V, VOUT = 1.2V, COUT = 22μF, TA = +25°C, unless otherwise noted.
MPM3804 – 0.6A, 5.5V INPUT STEP-DOWN MODULE SYNCHRONOUS REGULATOR WITH INTEGRATED INDUCTOR IN ULTRA-SMALL 2X2X0.9MM QFN PACKAGE MPM3804 Rev.1.0 www.MonolithicPower.com 7 5/2/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 5V, VOUT = 1.2V, COUT = 22μF, TA = +25°C, unless otherwise noted.
MPM3804 – 0.6A, 5.5V INPUT STEP-DOWN MODULE SYNCHRONOUS REGULATOR WITH INTEGRATED INDUCTOR IN ULTRA-SMALL 2X2X0.9MM QFN PACKAGE MPM3804 Rev.1.0 www.MonolithicPower.com 8 5/2/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 5V, VOUT = 1.2V, COUT = 22μF, TA = +25°C, unless otherwise noted.
MPM3804 – 0.6A, 5.5V INPUT STEP-DOWN MODULE SYNCHRONOUS REGULATOR WITH INTEGRATED INDUCTOR IN ULTRA-SMALL 2X2X0.9MM QFN PACKAGE MPM3804 Rev.1.0 www.MonolithicPower.com 9 5/2/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. PIN FUNCTIONS Pin # Name Description
1 VIN
Supply voltage. The MPM3804 operates from a +2.3V to +5.5V unregulated inp ut. A decoupling capacitor is needed to prevent large voltage spikes from appearing at the input. 2, 3, 4 SW Output switching node . SW is the drain of the internal , high-side, P-channel MOSFET. SW is not for testing and is for internal use only. 5 EN On/off control. 6, 7, 8 OUT Output voltage power rail and output voltage input sense . Connect the load to OUT. An output capacitor is needed to decrease the output voltage ripple.
9 FB/PG
MPM3804GG: Feedback. An external resistor divider from the output to GND tapped to FB sets the output voltage. MPM3804GG-XX: Power good indicator. The output of PG is an open-drain output. 10 GND Power ground.
MPM3804 – 0.6A, 5.5V INPUT STEP-DOWN MODULE SYNCHRONOUS REGULATOR WITH INTEGRATED INDUCTOR IN ULTRA-SMALL 2X2X0.9MM QFN PACKAGE MPM3804 Rev.1.0 www.MonolithicPower.com 10 5/2/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. BLOCK DIAGRAM Main Switch (PCH) Synchronous Rectifier ( NCH) Constant On- Time Pulse PWM Bias Voltage Reference 0.6V EN FB (Option 1) OUT COMP VIN FBCOMP EN Driver PDRV NDRV Soft start GND OUT PWM COMP -0.54V PG (Option 2) Hi-Z FB for fixed output E.A. Ramp generator COMP VOUT RST SW Lo-Iq Lo-Iq Lo-Iq Lo-Iq Lo-Iq VTH Fixed Rev SW Figure 1: Functional Block Diagram NOTE: FB is only for the MPM3804GG (option 1); PG is only for the MPM3804GG-XX (option 2).
MPM3804 – 0.6A, 5.5V INPUT STEP-DOWN MODULE SYNCHRONOUS REGULATOR WITH INTEGRATED INDUCTOR IN ULTRA-SMALL 2X2X0.9MM QFN PACKAGE MPM3804 Rev.1.0 www.MonolithicPower.com 12 5/2/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. internally. In light-load condition, t he SW on pulse time is determined by the on-time generator and AAM comparator. HS_ driverVREF VFB COT Generator EN IAAM IL_ sense R S Q FBCOMP AAMCOMP Figure 5: Simplified AAM Control Logic The MPM3804 uses a ZCD to determine when the inductor current starts to reverse. When the inductor current reaches the ZCD threshold, the low-side switch is turned off. AAM mode together with the ZCD circuit makes the MPM3804 work in DCM at light load continuously, even if VOUT is close to VIN. Enable (EN) When the input voltage is greater than the under-voltage lockout (UVLO) threshold (typically 2V), the MPM3804 can be enabled by pulling EN higher than 1.2V. Leav e EN floating or pull EN down to ground to disable the MPM3804. There is an internal 1M Ω resistor from EN to ground. When the device is disabled, the part goes into output discharge mode automatically . The internal discharge MOSFET provides a resistive discharge path for the output capacitor. Soft Start (SS) The MPM3804 has a built-in soft start (SS) that ramps up the output voltage at a controlled slew rate to avoid overshoot ing at start-up. The soft- start time is about 0.5ms, typically. Power Good Indicator (only fo r MPM3804GG-XX) The MPM3804 has an open drain and requires an external pull-up resistor (100kΩ~500kΩ) for the power good (PG) indicator. When V FB is within -10% of regulation voltage, V PG is pulled up to VIN by the external resistor. If V FB exceeds the -10% window, the internal MOSFET pulls PG to ground. The MOSFET has a maximum RDS(ON) of less than 100Ω. Current Limit The MPM3804 has a 1.3A, high-side, switch- current limit , typically . When the high -side switch reaches its current limit, the MP M3804 remains in hiccup mode until the current drops. This prevents the inductor current from continuing to rise and damaging components. Short Circuit and Recovery The MPM3804 enters short-circuit protection (SCP) mode when it reaches the current limit and attempts to recover with hiccup mode . The MPM3804 disables the output power stage, discharges the s oft-start capacitor , and attempts to soft start automatically. If the short - circuit condition remains after the soft start ends, the MPM3804 repeats this cycle until the short circuit is removed and the output rises back to regulation levels.
MPM3804 – 0.6A, 5.5V INPUT STEP-DOWN MODULE SYNCHRONOUS REGULATOR WITH INTEGRATED INDUCTOR IN ULTRA-SMALL 2X2X0.9MM QFN PACKAGE MPM3804 Rev.1.0 www.MonolithicPower.com 14 5/2/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. output voltag e ripple can be estimated with Equation (7): OUT OUT OUT 2 S 1 IN VVΔV1 8 f L C2 V For tantalum or electrolytic capacitors, the ESR dominates the impedance at the switching frequency. For simplification, the output ripple can be approximated with Equation (8): OUT OUT OUT ESR INS1 VVΔV 1 R f L V The characteristics of the output capacitor also affect the stability of the regulation system. Typically, a 10µF output capacitor is sufficient to meet most applications. Add a 22 μF output capacitor to achieve a low output voltage ripple. PCB Layout Guidelines Efficient PCB layout of the switching power supplies is critical for stable operation. For the high-frequency switching converter, a poor layout design can result in poor line or load regulation and stability issues. For best results, refer to Figure 7 and Figure 8 and follow the guidelines below. 1. Place the high -current paths (GND and IN) very close to the device with short, direct , and wide traces. 2. Place the input capacitor as close to IN and GND as possible. 3. Place the external feedback resistors next to FB (only for the MPM3804GG). VOUT Figure 7: Single-Layer PCB Layout Figure 8: Double-Layer PCB Layout
MPM3804 – 0.6A, 5.5V INPUT STEP-DOWN MODULE SYNCHRONOUS REGULATOR WITH INTEGRATED INDUCTOR IN ULTRA-SMALL 2X2X0.9MM QFN PACKAGE NOTICE: The information in this document is subject to change w ithout notice. 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. MPM3804 Rev.1.0 www.MonolithicPower.com 16 5/2/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved.
PACKAGE INFORMATION
QFN-10 (2mmx2mm) SIDE VIEW BOTTOM VIEW NOTE: 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. PIN 1 ID MARKING TOP VIEW PIN 1 ID INDEX AREA RECOMMENDED LAND PATTERN PIN 1 ID 0.125X45º TYP 0.125X45º