MP2141N MPS | Alldatasheet
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Technical content
1A, Synchronous, Step-Down Converter with 11µA Quiescent Current in SOT563 MP2141N Rev. 1.12 www.MonolithicPower.com 1 7/28/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved.
DESCRIPTION
The MP2141N is a monolithic, step -down, switch-mode converter with built -in, internal power MOSFETs. It can achieve 1A of continuous output current from a 2. 3V-to-5.5V input voltage range with excellent load and line regulation. The output volt age can be regulated as low as 0.6V. The constant-on-time control scheme provides a fast transient response and eases loop stabilization. Fault protections include cycle -by- cycle current limiting and thermal shutdown. The MP2141N is available in a n ultra-small SOT563 package and requires a minimal number of readily available , standard, external components. The MP2141N is ideal for a wide range of applications, including high-performance DSPs, wireless power, portable and mobile devices, and other low-power systems.
FEATURES
Low Quiescent Current: 11μA 2.2MHz Switching Frequency EN for Power Sequencing Wide 2.3V-to-5.5V Operating Input Range Output Adjustable from 0.6V Up to 1A Output Current 120mΩ and 80mΩ Internal Power MOSFET Switches Output Discharge Short-Circuit Protection (SCP) with Hiccup Mode Stable with Low ESR Output Ceramic Capacitors 100% Duty Cycle Power Good Only for Fixed Output Version Available in a SOT563 Package
APPLICATIONS
Wireless/Networking Cards Portable and Mobile Devices Battery-Powered Devices Low-Voltage I/O System Power 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 MP2141N GND FB VIN 10μF EN VIN VOUT 1.2V/1A SW 10μF 200kΩ 200kΩ EN OUT 1μH
MP2141N – 1A, SYNCHRONOUS, STEP-DOWN CONVERTER WITH 11µA IQ MP2141N Rev. 1.12 www.MonolithicPower.com 2 7/28/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved.
ORDERING INFORMATION
Part Number Package Top Marking VOUT Range MP2141NGTF* SOT563 See Below Adjustable MP2141NGTF-15 See Below Fixed 1.5V MP2141NGTF-18 See Below Fixed 1.8V * For Tape & Reel, add suffix –Z (e.g. MP2141NGTF–Z) ** Contact factory for fixed output options TOP MARKING (MP2141NGTF) AUD: Product code of MP2141NGTF Y: Year code LLL: Lot number TOP MARKING (MP2141NGTF-15) AUN: Product code of MP2141NGTF-15 Y: Year code LLL: Lot number TOP MARKING (MP2141NGTF-18) AUP: Product code of MP2141NGTF Y: Year code LLL: Lot number
MP2141N – 1A, SYNCHRONOUS, STEP-DOWN CONVERTER WITH 11µA IQ MP2141N Rev. 1.12 www.MonolithicPower.com 3 7/28/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. PACKAGE REFERENCE TOP VIEW TOP VIEW FB GND VIN SW EN OUT1 3 4 PG GND VIN SW EN OUT1 3 4 Adjustable Version MP2141NGTF Fixed Vo Version MP2141NGTF-18, MP2141NGTF-15 SOT563 ABSOLUTE MAXIMUM RATINGS (1) 6V (8V for <10ns or 10V for <3ns) Continuous power dissipation (TA = +25° C) (2) (4) Recommended Operating Conditions (3) Operating junction temp. (TJ). .. -40°C to +125°C Thermal Resistance 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 calc ulated 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 circuitry protects the device from permanent damage. 3) The device is not guaranteed to function outside of its operating conditions. 4) Measured on EV2141N-TF-00A, 2-layer PCB. 5) Measured on JESD51-7, 4-layer PCB.
MP2141N – 1A, SYNCHRONOUS, STEP-DOWN CONVERTER WITH 11µA IQ MP2141N Rev. 1.12 www.MonolithicPower.com 4 7/28/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
VIN = 3.6V, T J = -40° C to +125° C(7). 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 594 600 606 mV TJ = -40° C to +125° C 588 612 Fixed Output Voltage(8) Only for MP2141NGTF- 18,IOUT=10mA, TJ = 25°C 1.782 1.8 1.818 V Only for MP2141NGTF- 18,IOUT=10mA, TJ = -40° C to +125° C 1.764 1.8 1.836 V Only for MP2141NGTF-15, IOUT=10mA, TJ = 25°C 1.485 1.5 1.515 V Only for MP2141NGTF-15, IOUT=10mA, TJ = -40° C to +125° C 1.470 1.5 1.530 V Feedback current IFB VFB = 0.63V 50 100 nA P-FET switch on resistance RDSON_P 120 mΩ N-FET switch on resistance RDSON_N 80 mΩ Switch leakage current VEN = 0V, VIN = 6V, VSW = 0V and 6V, TJ = 25°C 0 1 μA P-FET peak current limit Sourcing 1.8 2.4 A N-FET valley current limit Sourcing, valley current limit 1.5 A ZCD 0 mA On time TON VIN = 5V, VOUT = 1.2V 110 ns VIN = 3.6V, VOUT = 1.2V 150 Switching frequency fs VIN = 5V, VOUT = 1.2V, IOUT = 500mA, TJ = 25°C(5) 1760 2200 2640 kHz VIN = 5V, VOUT = 1.2V, IOUT = 500mA, TJ = -40° C to +125°C(5) 1650 2200 2750 kHz Minimum off time TMIN-OFF 60 ns Minimum on time(6) TMIN-ON 60 ns Soft-start time TSS-ON VOUT rise from 10% to 90% 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 Output discharge resistor RDIS VEN = 0V, VOUT = 1.2V 1 kΩ EN input current VEN = 2V 1.2 μA VEN = 0V 0 μA Supply current (shutdown) VEN = 0V, TJ = 25°C 0 1 μA
MP2141N – 1A, SYNCHRONOUS, STEP-DOWN CONVERTER WITH 11µA IQ MP2141N Rev. 1.12 www.MonolithicPower.com 5 7/28/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. VIN = 3.6V, T J = -40° C to +125° C(7). 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 Supply current (quiescent) VEN = 2V, VFB = 0.63V, VIN = 3.6V, 5V, TJ = 25°C 11 13 μA Thermal shutdown(6) 160 °C Thermal hysteresis(6) 30 °C Power Good Leakage Current (Fixed Vo version only) IPG 50 100 nA Power Good Upper Trip Threshold (Fixed Vo version only) Vo with Respect to the Regulation 90 % Power Good Lower Trip Threshold (Fixed Vo version only) 85 % Power Good Delay (Fixed Vo version only) 70 μs Power Good Sink Current Capability (Fixed Vo version only) Sink 1mA 400 mV NOTES: 6) Guaranteed by engineer sample characterization, no production test. 7) Guaranteed by characterization test, no production test. 8) Without sleep mode.
MP2141N – 1A, SYNCHRONOUS, STEP-DOWN CONVERTER WITH 11µA IQ MP2141N Rev. 1.12 www.MonolithicPower.com 6 7/28/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS VIN = 5V, VOUT = 1.2V, L = 1.0µ H, TA = +25°C, unless otherwise noted.
MP2141N – 1A, SYNCHRONOUS, STEP-DOWN CONVERTER WITH 11µA IQ MP2141N Rev. 1.12 www.MonolithicPower.com 7 7/28/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 5V, VOUT = 1.2V, L = 1.0µ H, TA = +25°C, unless otherwise noted.
MP2141N – 1A, SYNCHRONOUS, STEP-DOWN CONVERTER WITH 11µA IQ MP2141N Rev. 1.12 www.MonolithicPower.com 8 7/28/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 5V, VOUT = 1.2V, L = 1.0µ H, TA = +25°C, unless otherwise noted.
MP2141N – 1A, SYNCHRONOUS, STEP-DOWN CONVERTER WITH 11µA IQ MP2141N Rev. 1.12 www.MonolithicPower.com 9 7/28/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 5V, VOUT = 1.2V, L = 1.0µ H, TA = +25°C, unless otherwise noted.
MP2141N – 1A, SYNCHRONOUS, STEP-DOWN CONVERTER WITH 11µA IQ MP2141N Rev. 1.12 www.MonolithicPower.com 10 7/28/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 5V, VOUT = 1.2V, L = 1.0µ H, TA = +25°C, unless otherwise noted.
MP2141N – 1A, SYNCHRONOUS, STEP-DOWN CONVERTER WITH 11µA IQ MP2141N Rev. 1.12 www.MonolithicPower.com 11 7/28/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. PIN FUNCTIONS Pin # Name Description
1 FB/PG
MP2141NGTF: Feedback. An external resistor divider from the output to GND tapped to FB sets the output voltage. MP2141NGTF-18: Power Good Indicator. The output of this pin is an open drain with external pull up resistor to Vin. 2 GND Power ground. 3 VIN Supply voltage. The MP2141N operates from a +2.3V to +5.5V unregulated input. A decoupling capacitor is needed to prevent large voltage spikes from appearing at input. 4 SW Output switching node. SW is the drain of the internal high -side P-channel MOSFET. Connect the inductor to SW to complete the converter. 5 EN On/off control. 6 OUT Output voltage power rail and input sense. Connect the load to OUT. An output capacitor is needed to decrease the output voltage ripple.
MP2141N – 1A, SYNCHRONOUS, STEP-DOWN CONVERTER WITH 11µA IQ MP2141N Rev. 1.12 www.MonolithicPower.com 12 7/28/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. BLOCK DIAGRAM Main Switch (PCH) Synchronous Rectifier (NCH) Constant On -Time Pulse PWM Bias Voltage Reference 0.6V EN FB SW COMP VIN FBCOMP EN Driver PDRV NDRV Soft start GND OUT PWM COMP -0.54V PG (Optional 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 (Optional 1) COMP 0.66V Figure 1: Functional Block Diagram Note: Option 1- FB pin is only for MP2141NGTF Option 2- PG pin is only for MP2141NGTF-18
MP2141N – 1A, SYNCHRONOUS, STEP-DOWN CONVERTER WITH 11µA IQ MP2141N Rev. 1.12 www.MonolithicPower.com 15 7/28/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. Current Limit The MP2141N has a 2.4A high -side switch current limit , typically. When the high -side switch reaches its current limit, the MP2141N 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 MP2141N enters short-circuit protection mode when it reaches the current limit and attempts to recover with hiccup mode . The MP2141N disables the output power stage, discharges the soft -start capacit or, and then attempts to soft start again automatically. If the short-circuit condition remains after the soft start ends, the MP2141N repeats this cycle until the short circuit disappears and the output rises back to regulation level.
MP2141N – 1A, SYNCHRONOUS, STEP-DOWN CONVERTER WITH 11µA IQ MP2141N Rev. 1.12 www.MonolithicPower.com 17 7/28/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved. The input capacitor can be electrolytic, tantalum, or ceramic. When using electrolytic or tantalum capacitors, add a small , high-quality 0.1μF ceramic capacitor as close to the IC as possible. When using ceramic capacitors, ensure that they have enough capacitance to provide a sufficient charge to prevent excessive voltage ripple at the input. The input vo ltage ripple caused by the capacitance can be estimated with Equation (7): LOAD OUT OUT IN INS IN I V VV1 f C1 V V (7) Selecting the Output Capacitor The output capacitor (C2) stabilizes the DC output voltage. Ceramic capacitors are recommended. For best results, use low ESR capacitors to limit the output voltage ripple. The output voltage ripple can be estimated with Equation (8): OUT OUT OUT ESR S 1 IN S VV 1V 1 R f L V 8 f C2 (8) Where L1 is the inductor value and R ESR is the equivalent series resistance (ESR) value of the output capacitor. When using ceramic capacitors, the capacitance dominates the impedance at the switching frequency, and causes most of the output voltage ripple. For simplification, the output voltage ripple can be estimated with Equation (9): OUT OUT OUT 2 S 1 IN VVΔV1 8 f L C2 V (9) For tantalum or electrolytic capacitors, the ESR dominates the impedance at the switching frequency. For simplification, the output ripple can be approximated with Equation (10): OUT OUT OUT ESR INS1 VVΔV 1 R f L V (10) The characteristics of the outpu t capacitor also affect the stability of the regulation system. 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 11 and follow the guidelines below. 1. Place the high -current paths (GND, IN , and SW) 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. 4. Keep the switching node SW short and away from the feedback network. 5. Keep the VOUT sense line as short as possible or keep it away from the power inductor. LoutG N D Cout GND Vin Vout EN Cin 3 4 VIN EN OUTFB GND SW Figure 11: Two Ends of the Input Decoupling Capacitor Close to Pin 2 and Pin 3
MP2141N – 1A, SYNCHRONOUS, STEP-DOWN CONVERTER WITH 11µA IQ NOTICE: The information in this document is subject to change without 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. MP2141N Rev. 1.12 www.MonolithicPower.com 19 7/28/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2017 MPS. All Rights Reserved.
PACKAGE INFORMATION
PACKAGE OUTLINE DRAWING FOR 6L SOT563 MF-PO-D-0250 revision 1.0 FRONT VIEW NOTE: 1) ALL DIMENSIONS ARE IN MILLIMETERS. 2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH, PROTRUSION OR GATE BURR. 3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. 4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.10 MILLIMETERS MAX. 5) DRAWING IS NOT TO SCALE. TOP VIEW BOTTOM VIEW RECOMMENDED LAND PATTERN SIDE VIEW PIN 1 ID