171930601

171930601 MagI3 C Power Module WPME-VDMM - Variable Step Down MicroModule 3.5V - 36V Input / 0.3A Output / 1V - 6V Output DESCRIPTION FEATURES The VDMM 171930601 MagI3 C power module provides a fully integrated DC-DC converter including the switching regulator IC with integrated MOSFETs, controller, compensation and shielded inductor in one package. • • • • • • • • • • • • • • • • • • • Peak efficiency up to 87% Current capability up to 0.3A Input voltage range: 3.5V to 36V Output voltage range: 1V to 6V 12.5µA typical quiescent current Integrated shielded inductor Fixed switching frequency: 1.2MHz Current mode control Synchronous operation Undervoltage lockout Internal soft-start Adjustable soft-start Power good indicator Thermal shutdown Short-circuit protection Cycle-by-cycle current limit RoHS und REACh compliant Ambient temp. range: -40°C to 105°C No output current derating up to 85°C ambient temperature • Operating junction temp. range: -40°C to 125°C • Complies with EN55032 class B radiated and conducted emissions standards The 171930601 offers high efficiency and delivers up to 0.3A of output current. It operates with an input voltage from 3.5V to 36V and is designed for a small solution size. The MicroModule maintains high efficiency throughout the output current range by autmoatically transitioning between operating modes based on the load demands. The 171930601 is available in an LGA-8EP package (5 x 2.5 x 1.8mm). This module has integrated protection circuitry that guards against thermal overstress with thermal shutdown and protects against electrical damage using overcurrent, short-circuit and undervoltage protections. TYPICAL APPLICATIONS • • • • Test and measurement Industrial control HVAC and building control Sensors TYPICAL CIRCUIT DIAGRAM 3 VIN Module VOUT VIN 4, 5 RFBT 2 EN/SS CIN 1 VOUT FB 8 CFF COUT PG PGND PGND 7 GND RFBB GND EP/9 Data Sheet Version 2.0 www.we-online.com/powermodules © July 2023 1 171930601 MagI3 C Power Module WPME-VDMM - Variable Step Down MicroModule CONTENTS 1 PINOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 ORDERING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 SALES INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 ABSOLUTE MAXIMUM RATINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 OPERATING CONDITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 6 THERMAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 7 ELECTRICAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 8 RoHS, REACh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 9 PACKAGE SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 10 NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 11 TYPICAL PERFORMANCE CURVES . . . . . . . . 11.1 EMI: Radiated and Conducted Emissions . . 11.1.1 Test Setup . . . . . . . . . . . . . . . 11.1.2 Radiated and Conducted Emissions 11.2 DC Performance Curves . . . . . . . . . . . 11.2.1 Efficiency 12Vin . . . . . . . . . . . 11.2.2 Efficiency 24Vin . . . . . . . . . . . 11.2.3 Thermal Derating 12Vin . . . . . . 11.2.4 Thermal Derating 24Vin . . . . . . 11.2.5 Operating Range . . . . . . . . . . . 11.2.6 Load Regulation . . . . . . . . . . . 11.2.7 Line Regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 9 9 10 11 11 11 12 12 13 14 14 12 BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 13 CIRCUIT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 14 DESIGN FLOW . . . . . . . . . . . . . . . . . . . . . . . 14.1 STEP 1 Setting The Output Voltage (VOUT ) . . . . 14.2 STEP 2 Select The Input Capacitor (CIN ) . . . . . . 14.3 STEP 3 Select The Output Capacitor (COUT ) . . . . 14.4 STEP 4 Select The Feed-Forward Capacitor (CFF ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 17 18 18 20 15 MODES OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 16 OUTPUT VOLTAGE RIPPLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 17 PROTECTION FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . 17.1 Over Current Protection (OCP) and Short Circuit Protection (SCP) 17.2 Over Temperature Protection (OTP) . . . . . . . . . . . . . . . . . 17.3 Input Undervoltage Lockout (UVLO) . . . . . . . . . . . . . . . . . 17.4 Enable / Adjustable Soft-Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 23 24 24 25 18 DESIGN EXAMPLE . . 18.1 Layout . . . . . 18.2 Schematic . . . 18.3 Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 26 27 27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . Data Sheet Version 2.0 www.we-online.com/powermodules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . © July 2023 2 171930601 MagI3 C Power Module WPME-VDMM - Variable Step Down MicroModule 19 HANDLING RECOMMENDATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 19.1 Soldering Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 20 PHYSICAL DIMENSIONS . 20.1 Component . . . . . 20.2 Example Landpattern 20.3 Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 29 30 31 21 DOCUMENT HISTORY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 22 LIST OF FIGURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 23 LIST OF TABLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 24 CAUTIONS AND WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 25 IMPORTANT NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Data Sheet Version 2.0 www.we-online.com/powermodules © July 2023 3 171930601 MagI3 C Power Module WPME-VDMM - Variable Step Down MicroModule 1 PINOUT VOUT 4 5 VOUT VIN 3 6 NC EP PGND EN/SS 2 PG 1 Top View 7 PGND 8 FB Bottom View Figure 1: Pinout. Table 1: Marking description. MARKING DESCRIPTION WE Logo 171930601 Order Code • YYWWXXXX Pin one indicator, year, week and lot number Table 2: Pin description. SYMBOL NUMBER TYPE PG 1 Output DESCRIPTION Power good flag pin. This open drain output asserts low if the output voltage is lower than 90% or higher than 110% of the set value. A pull-up resistor of 100kΩ is recommended if this function is used. EN/SS 2 Input Enable pin. Setting this pin high enables the device, while setting this pin low shuts down the device. This pin must not be left floating. An internal soft-start of 2ms has already been implemented in the MicroModule. For an external soft-start function, an external resistor (RSS ) and capacitor (CSS ) should be used. VIN 3 Power Input voltage pin. Place the input capacitor as close as possible to VIN and PGND. VOUT 4, 5 Power Output voltage pin. Place output capacitors as close as possible to VOUT and PGND. For thermal performance, use copper plane(s) at this pin. NC 6 PGND 7 Pin is not internally electrically connected. Power Power ground pin. This pin must be connected to the ground plane and to the exposed pad for the best thermal performance. Feedback pin. This pin must be connected to the external resistor divider (between VOUT and PGND) to adjust the output voltage. The trace between VOUT, FB and through the external resistor divider should be kept as short and near to the module as possible. FB 8 Input PGND EP Exposed Pad Data Sheet Version 2.0 www.we-online.com/powermodules Exposed pad. This pin is electrically connected internally to PGND. It is recommended to connect this pad to the ground plane for device heat dissipation. © July 2023 4 171930601 MagI3 C Power Module WPME-VDMM - Variable Step Down MicroModule 2 ORDERING INFORMATION Table 3: Ordering information. ORDER CODE SPECIFICATIONS PACKAGE PACKAGING UNIT 171930601 0.3A / 1V-6V Vout version LGA-8EP 7” Reel (1000 pieces) 178930601 0.3A / 1V-6V Vout version Eval Board Box with 1 piece 3 SALES INFORMATION Table 4: Package specifications. SALES CONTACT Würth Elektronik eiSos GmbH & Co. KG EMC and Inductive Solutions Max-Eyth-Str. 1 74638 Waldenburg Germany Tel. +49 (0) 7942 945 0 www.we-online.com/powermodules Technical support: powermodules@we-online.com Data Sheet Version 2.0 www.we-online.com/powermodules © July 2023 5 171930601 MagI3 C Power Module WPME-VDMM - Variable Step Down MicroModule 4 ABSOLUTE MAXIMUM RATINGS Caution: Exceeding the listed absolute maximum ratings may affect the device negatively and may cause permanent damage. Table 5: Absolute maximum ratings. SYMBOL VIN VOUT LIMIT PARAMETER UNIT MIN(1) MAX(1) Input pin voltage -0.3 40 V Output pin voltage -0.3 40 V FB Feedback pin voltage -0.3 6.2 V EN Enable pin voltage -0.3 40 V PG Power good pin voltage -0.3 6.2 V IPG Power Good Pin Current — 8 mA Assembled, non-operating storage temperature -40 125 °C Tstorage 5 OPERATING CONDITIONS Operating conditions are conditions under which the device is intended to be functional. All values are referenced to GND. MIN and MAX limits are valid for the recommended ambient temperature range of -40°C to 105°C. Table 6: Operating conditions. SYMBOL VIN VOUT PARAMETER Input voltage TYP(3) MAX(1) UNIT 3.5 — 36 V 1 — 6 V Ta Ambient temperature range -40 — 105(2) °C Tjop Junction temperature range -40 — 125 °C — (4) Iout Output voltage MIN(1) Nominal output current — 0.3 A 6 THERMAL SPECIFICATIONS Caution: Typical values represent the statistically utmost probable values at the following conditions: VIN = 24V, VOUT = 5V, CIN = 4.7µF, COUT = 47µF, TA = 25°C unless otherwise noted. Table 7: Thermal specifications. SYMBOL ΘJA PARAMETER (4) Junction-to-ambient thermal resistance ΘJC Junction-to-case (top) thermal resistance TSD Thermal shutdown, rising Thermal shutdown, hysteresis Data Sheet Version 2.0 www.we-online.com/powermodules (4) TYP(3) UNIT 55 K/W 40 K/W 155 25 °C °C © July 2023 6 171930601 MagI3 C Power Module WPME-VDMM - Variable Step Down MicroModule 7 ELECTRICAL SPECIFICATIONS Caution: MIN and MAX limits are valid for the recommended ambient temperature range of -40°C to 105°C. Typical values represents statistically the utmost probable values at the following conditions: VIN = 24V, VOUT = 5V, CIN = 4.7µF ceramic, COUT = 47µF ceramic, TA = 25°C unless otherwise noted. Table 8: Electrical specifications part 1. SYMBOL PARAMETER TEST CONDITIONS MIN(1) TYP(3) MAX(1) UNIT 0.739 0.75 0.761 V -0.1 — 0.1 nA — — — — 0.06 1.35 10 7 — — — — % % mVpp mVpp OUTPUT VOLTAGE VFB Reference voltage IFB Feedback input bias current VOUT Line regulation Load regulation VIN = 8V to 36V, IOUT = 0.3A 0.03A ≤ ILOAD ≤ 0.3A IOUT = 0.03A, 20MHz BWL IOUT = 0.3A, 20MHz BWL Output voltage ripple OUTPUT CURRENT IOUT Output current — — 0.3 A ICL-HS High side switch current limit 1 1.3 — A — 1.2 — MHz SWITCHING FREQUENCY fSW Switching frequency ENABLE AND UNDERVOLTAGE LOCKOUT VUVLO VIN undervoltage threshold VIN increasing VIN decreasing 2.7 2.6 2.8 2.7 2.9 2.8 V V VEN/SS EN/SS threshold Enable logic high Enable logic low 2.5 — — — 36 0.3 V V IEN/SS EN/SS pin input current VIN = 36V, Enable = high VIN = 36V, Enable = low — -0.1 0.1 — 0.3 0.1 µA µA — 2 — ms — — — 87 87 83 — — — % % % SOFT-START tSS TA = 25°C (rising edge to 95% of VOUT ) Soft-start time EFFICIENCY η VIN = 5V, VOUT = 3.3V, IOUT = 0.3A VIN = 12V, VOUT = 5V, IOUT = 0.3A VIN = 24V, VOUT = 5V, IOUT = 0.3A Efficiency INPUT QUIESCENT AND SHUTDOWN CURRENT ISD IIN-NL IQ Shutdown current VIN = 12V, VEN = low VIN = 24V, VEN = low — — 1.7 2.8 — — µA µA No load input current VOUT = 3.3V — 15.3 — µA Quiescent current VIN = 12V, Enable = high VIN = 24V, Enable = high — — 12.5 13.5 — — µA µA Output capacitance These values are absolute. Practical capacitor values need to have derating aspects considered. 20 47 150 µF OUTPUT CAPACITANCE COUT_MAX Data Sheet Version 2.0 www.we-online.com/powermodules © July 2023 7 171930601 MagI3 C Power Module WPME-VDMM - Variable Step Down MicroModule 8 RoHS, REACh Table 9: RoHS, REACh. Directive 2011/65/EU of the European Parliament and the Council of June 8th, 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment. Directive 1907/2006/EU of the European Parliament and the Council of June 1st, 2007 regarding the Registration, Evaluation, Authorization and Restriction of Chemicals (REACh). RoHS directive REACh directive 9 PACKAGE SPECIFICATIONS Table 10: Package specifications. 10 ITEM PARAMETER TYP(3) UNIT Mold Compound UL94V-0 — — Weight — 0.04341 g NOTES (1) Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality Control (SQC) methods. (2) Depending on heat sink desing, number of PCB layers, copper thickness and air flow. (3) Typical numbers are valid at 25°C ambient temperature and represent statistically the utmost probable values assuming a Gaussian distribution. (4) Measured on the 178930601 evaluation board, a 80 x 80mm two layer board with 35µm (1 ounce) copper. Data Sheet Version 2.0 www.we-online.com/powermodules © July 2023 8 171930601 MagI3 C Power Module WPME-VDMM - Variable Step Down MicroModule 11 TYPICAL PERFORMANCE CURVES If not otherwise specified, the following conditions apply: VIN = 24V, CIN = 4.7µF X7R 50V ceramic, COUT = 47µF X5R ceramic, CFF = 220pF, TAMB = 25°C. 11.1 Radiated and Conducted Emissions EN55032 (CISPR-32) Class B Compliance The 171930601 MicroModule is tested with a standard EMC confguration (1m wire between the module and the load) to give more realistic information about implementation in applications. The test setup is based on CISPR16 with the limit values from CISPR-32. Measured with module on an evaluation board 178930601 in a fully anechoic room (FAR) at 3m antenna distance. 11.1.1 TEST SETUP Input wire length: • Radiated Emission: 160cm (80cm Horizontal + 80cm Vertical) • Conducted Emissions: 80cm Output wire length: • Long wire (with input filter): 1m Data Sheet Version 2.0 www.we-online.com/powermodules © July 2023 9 171930601 MagI3 C Power Module WPME-VDMM - Variable Step Down MicroModule 11.1.2 Radiated and Conducted Emissions 80 Conducted Emissions in dBµV 70 EN55032 Class B Quasi Peak Limit 60 EN55032 Class B Average Limit 50 40 30 20 10 0 -10 0.15 1 Quasi-Peak Frequency in MHz Average 10 30 Quasi-Peak Figure 2: 171930601 conducted emissions (3m antenna distance) VIN = 24V, VOUT = 5V, ILOAD = 0.3A with input filter CF = 4.7µF, LF = 1µH. Radiated Emissions in dBµV/m 70 60 EN55032 Class A Limit 50 EN55032 Class B Limit 40 30 20 10 0 -10 30 100 Horizontal Frequency in MHz Vertical 1000 Horizontal Figure 3: 171930601 radiated emissions (3m antenna distance) VIN = 24V, VOUT = 5V, ILOAD = 0.3A with input filter CF = 4.7µF, LF = 1µH. Data Sheet Version 2.0 www.we-online.com/powermodules © July 2023 10 171930601 MagI3 C Power Module WPME-VDMM - Variable Step Down MicroModule 11.2 DC PERFORMANCE CURVES Efficiency in % 11.2.1 Efficiency 12VIN 100 90 80 70 60 50 40 30 20 10 0 0 0.05 0.10 Vout = 5V Vout = 1.8V 0.15 Output Current in A Vout = 3.3V Vout = 1.5V 0.20 0.25 0.30 Vout = 2.5V Vout = 1.2V Figure 4: 171930601 efficiency VIN = 12V, TA = 25°C. Efficiency in % 11.2.2 Efficiency 24VIN 100 90 80 70 60 50 40 30 20 10 0 0 0.05 0.10 Vout = 5V Vout = 1.8V 0.15 Output Current in A Vout = 3.3V Vout = 1.5V 0.20 0.25 0.30 Vout = 2.5V Vout = 1.2V Figure 5: 171930601 efficiency VIN = 24V, TA = 25°C. Data Sheet Version 2.0 www.we-online.com/powermodules © July 2023 11 171930601 MagI3 C Power Module WPME-VDMM - Variable Step Down MicroModule 11.2.3 Thermal Derating 12VIN 0.35 Output Current in A 0.30 0.25 0.20 0.15 0.10 0.05 0 0 10 20 30 40 Vout = 5V 50 60 70 80 Ambient Temperature in °C Vout = 3.3V 90 100 110 120 130 Vout = 5V Figure 6: 171930601 output current thermal derating VIN = 12V, ΘJA = 55 K/W. 11.2.4 Thermal Derating 24VIN 0.35 Output Current in A 0.30 0.25 0.20 0.15 0.10 0.05 0 0 10 20 30 Vout = 5V 40 50 60 70 80 Ambient Temperature in °C Vout = 3.3V 90 100 110 120 130 Vout = 5V Figure 7: 171930601 output current thermal derating VIN = 24V, ΘJA = 55 K/W. Note: Both thermal derating graphs were measured on the 178930601 Evaluation Board (80 x 80mm two layer board with 35µm (1 ounce) copper). Please see TA limits in OPERATING CONDITIONS. Data Sheet Version 2.0 www.we-online.com/powermodules © July 2023 12 171930601 MagI3 C Power Module WPME-VDMM - Variable Step Down MicroModule Vin in V 11.2.5 Operating Range Vout in V Figure 8: 171930601 output voltge vs. maximum input voltage. Data Sheet Version 2.0 www.we-online.com/powermodules © July 2023 13 171930601 MagI3 C Power Module WPME-VDMM - Variable Step Down MicroModule 11.2.6 LOAD REGULATION Output Voltage Deviation in % 2.0 1.5 1.0 0.5 0 -0.5 -1.0 0 0.05 0.10 Vout = 5V Vout = 1.8V 0.15 Output Current in A Vout = 3.3V Vout = 1.5V 0.20 0.25 0.30 Vout = 2.5V Vout = 1.2V Figure 9: 171930601 load regulation VIN = 24V, VOUT = 3.3V, TA = 25°C. 11.2.7 LINE REGULATION 1.0 Output Voltage Deviation in % 0.75 0.5 0.25 0 -0.25 -0.5 -0.75 -1.0 8 12 16 Vout = 5V, Iout = 0.03A Vout = 3.3V, Iout = 0.3A 20 24 28 Input Voltage in V Vout = 3.3V, Iout = 0.03A 32 36 Vout = 5V, Iout = 0.3A Figure 10: 171930601 line regulation VOUT = 3.3V, IOUT = 0.3A, TA = 25°C. Data Sheet Version 2.0 www.we-online.com/powermodules © July 2023 14 171930601 MagI3 C Power Module WPME-VDMM - Variable Step Down MicroModule 12 BLOCK DIAGRAM 3 VIN 4.7µH VIN VOUT 4, 5 VOUT PWM Modulator Drivers RFBT Logic circuitries UVLO SS 2 EN/SS CIN OTP SS OCP detect Slope SS Comp. COUT FB OSCILLATOR SS COMP SS PG 8 EA SS 1 CFF OCP ref. VREF 0.75V RFBB PGND 7, 9/EP Figure 11: 171930601 block diagram. 13 CIRCUIT DESCRIPTION The MagI3 C 171930601 MicroModule is a fully integrated DC-DC power supply including the switching regulator with integrated MOSFETs, controller and compensation, as well as the shielded inductor in one package. The control scheme is based on a current mode (CM) regulation loop. The VOUT of the regulator is divided by the feedback resistor network RFBT and RFBB and fed into the FB pin. The error amplifier compares this signal with the internal 0.75V reference. The error signal is amplified and controls the on-time of a fixed frequency pulse width generator. This signal drives the power MOSFETs. The current mode architecture features a constant frequency during load steps. Only the on-time is modulated. It is internally compensated and stable with low ESR output capacitors and requires no external compensation network. This architecture supports fast transient response and very small output voltage ripples (