sgm2101 sg-micro, sgm2101 Datasheet
sgm2101
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sgm2101 Summary of contents
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... GENERAL DESCRIPTION The SGM2101 is a single chip power management unit for a wide range of portable applications. It incorporates three synchronous switching regulators and two switching regulator controllers in a space saving thin QFN package. High efficiency, compact size and flexible configuration make SGM2101 the ideal power supply solution for two AA cells or single Li-ion battery powered equipments ...
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... ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. Five-Channel, High Efficiency, DC-DC Power Management Unit MARKING INFORMATION SGM2101YTQ48 Tape and Reel, 2500 FUNCTION PACKAGE OPTION 2 ...
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... SGM2101 PIN DESCRIPTION PIN NAME Power Ground. Connect all PGxx_ pins to GND with short wide traces as close to the IC as possible. 7 PGSD Buck Converter Switching Node. Connect to the inductor of the buck converter. LXSD is high 8 LXSD impedance in shutdown. Buck Converter Supply Input. Bypass to GND with a 1µF ceramic capacitor. The efficiency of this ...
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... SGM2101 PIN DESCRIPTION PIN NAME Open-Drain, Active-Low, Power-OK Signal of AUXB. has successfully completed soft-start. 23 AUXBOK thermal limit. Open-Drain, Active-Low, Power-OK Signal of Buck Converter. successfully completed soft-start. 24 SDOK limit. Oscillator Control. Connect a timing capacitor from OSC to GND and a timing resistor from OSC to PVSU (or other DC voltage) to set the oscillator frequency between 100kHz and 1MHz ...
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... SGM2101 PIN DESCRIPTION PIN NAME IC Power Input. Connect pin 40 and pin 45 two PV pins together in application Analog Ground. Connect all PGxx_ pins to GND with short wide traces as close to the IC as possible. 41 GND No internal connection. 42 N.C. AUXA Controller Gate-Drive Output. Connect to the gate of an NMOS. DLA drives between PVSU and GND and supplies up to 500mA ...
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... SGM2101 ELECTRICAL CHARACTERISTICS ( PVSU PV PVM PVSD INDLB PARAMETER GENERAL Input Voltage Range Boost Minimum Startup Voltage Shutdown Supply Current into PV Shutdown Supply Current into PV with Boost Enabled Shutdown Supply Current into PV with Boost and Buck Enabled Shutdown Supply Current into PV ...
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... SGM2101 ELECTRICAL CHARACTERISTICS ( PVSU PV PVM PVSD INDLB PARAMETER SU (BOOST REGULATOR) Boost Startup-to-Normal Operating Threshold Boost Startup-to-Normal Operating Threshold Hysteresis Boost Voltage Adjust Range Start Delay of ONSD, ONM, ONA and ONB after SU in Regulation FBSU Regulation Voltage FBSU to CCSU Transconductance ...
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... SGM2101 ELECTRICAL CHARACTERISTICS ( PVSU PV PVM PVSD INDLB PARAMETER MAIN (BOOST/BUCK REGULATOR) Main Boost Voltage Adjust Range Main Buck Voltage Adjust Range PVM Undervoltage Lockout in Buck Mode FBM Regulation Voltage FBM to CCM Transconductance FBM Input Leakage Current Skip Mode Trip Level ...
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... SGM2101 ELECTRICAL CHARACTERISTICS ( PVSU PV PVM PVSD INDLB PARAMETER SD (BUCK REGULATOR) Buck Output-Voltage Adjust Range FBSD Regulation Voltage FBSD to CCSD Transconductance FBSD Input Leakage Current Skip Mode Trip Level Current-Sense Amplifier Transresistance LXSD Leakage Current Switch On-Resistance P-Channel Current Limit ...
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... SGM2101 ELECTRICAL CHARACTERISTICS ( PVSU PV PVM PVSD INDLB PARAMETER AUXA and AUXB DC/DC CONTROLLERS Maximum Duty Cycle FBAH, FBB Regulation Voltage FBAL Regulation Voltage AUXB Transconductance AUXA FBAL or FBAH to CC Transconductance FBx Input Leakage Current DLx Driver Resistance DLx Drive Current ...
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... SGM2101 TYPICAL PERFORMANCE CHARACTERISTICS Step-Up Efficiency vs. Load Current 100 Load Current (mA) Main(Step-Down) Efficiency vs. Load Current 100 Output Current (mA) AUXB Efficiency vs. Load Current 100 OUT_AUXB Load Current (mA) SG Micro Limited www ...
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... SGM2101 TYPICAL PERFORMANCE CHARACTERISTICS SG Micro Limited www.sg-micro.com Five-Channel, High Efficiency, DC-DC Power Management Unit 12 ...
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... SGM2101 TYPICAL PERFORMANCE CHARACTERISTICS No-Load Input Current vs.Input Voltage (Switching Input Voltage (V) Reference Voltage vs. Reference Load Current 1.252 1.2516 1.2512 1.2508 1.2504 1.25 1.2496 1.2492 1.2488 1.2484 1.248 0 50 100 150 200 Reference Load Current (µ ...
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... SGM2101 DETAILED DESCRIPTION The SGM2101 includes the following blocks to build a multiple-output power management unit for portable equipments. It can accept inputs from a variety of sources including 1-cell Li+ batteries, 2-cell alkaline or NiMH batteries, and even systems designed to accept both battery types. The SGM2101 includes five DC/DC converter channels to generate all required voltages: • ...
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... SGM2101 V BATT C14 10μF L5 4.7μH 2.5V C15 10μF R16 N1 193.18kΩ R17 90.9kΩ 47kΩ Figure 1. Typical 1-Cell Li+ Powered System (3.3V logic is stepped down from +5V or Battery, and 1.8V core is stepped down directly from the battery. Alternate connections are shown in the following Figures.) SG Micro Limited www ...
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... SGM2101 V SU C15 10μF L5 4.7μH 2.5V C16 10μF R16 N1 193.18kΩ R17 90.9kΩ 47kΩ Figure 2. Typical 2-Cell AA-Powered System (3.3V is boosted from the battery and 1.8V is stepped down from V SG Micro Limited www.sg-micro.com SUSDB INDLB P1 DLBP ...
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... SGM2101 V BATT C14 10μF L5 4.7μH 2.5V C15 10μF R16 193.18kΩ R17 90.9kΩ 47kΩ Figure 3. Li+ or Multibattery Input (This power supply accepts inputs from 1.5V to 4.2V can operate from either 2 AA cells or 1 Li+ cell. The 3.3V logic supply and the 1.8V core supply are both stepped down from 5V for true boost-buck operation ...
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... SUSSD FLTALL _ FAULT + A and B VOLTAGE- MODE SOFT-START DC-TO-DC RAMP GENERATOR CONTROLLERS To V REF SUSSD FLTALL DL_ AUXBOK Figure 4. SGM2101 Functional Diagram Five-Channel, High Efficiency, DC-DC Power Management Unit TO INTERNAL POWER PV 1.25V REF REFERENCE GND PVSU LXSU PGSU ONSU FLTALL PVSD LXSD PGND SDOK ...
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... MOSFETs, so output power is determined by external components. The controllers regulate output voltage by modulating the pulse width of the DL_ driver. On the SGM2101, AUXB is PWM controller. AUXA is a boost/flyback controller that can be connected to regulate output voltage and/or current (for white-LED drive). AUXB can be configured to buck or boost DC/DC by SUSDB pin, the output power is dependent on external MOSFETs ...
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... OUT Figure 8. Adding a PWM Channel with an External Slave Controller Fault Protection The SGM2101 has robust fault and overload protection. After power-up, the device is set to detect an out-of-regulation state that could be caused by an overload or short. If any DC/DC converter channel (boost, main, buck, or any of the auxiliary controllers) ...
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... PWM FBSD PGSD Reference The SGM2101 has a precise 1.25V reference. Connect a 0.1µF ceramic bypass capacitor from REF to GND within 0.2in (5mm) of the REF pin. REF can source up to 200µA and is enabled whenever ONSU is high and PVSU is above 2.5V. If the 200µA REF load limit must be exceeded, buffer REF with an external op amp ...
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... The startup oscillator drives the internal N-channel MOSFET at LXSU until PVSU reaches 2.5V, at which point voltage control is passed to the current-mode PWM circuitry. Once in regulation, the SGM2101 operates with inputs OSC as low as 1.1V since internal power for the IC is (1.25V). In turn, the supplied by PVSU. At low input voltages, the boost may have difficulty starting into heavy loads ...
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... C OSC OSC Setting Output Voltages All SGM2101 output voltages are resistor set. The FB_ threshold is 0.8V for all channels except for FBAL (0.2V). When setting the voltage for any channel, connect a resistive voltage-divider from the channel output to the corresponding FB_ input and then to GND. ...
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... SGM2101 where D is the duty factor given by Given L , the consistent peak-to-peak inductor IDEAL current is 0 D). The peak inductor current, OUT D). IND(PK) OUT Inductance values smaller than L reduce inductor size; however, if much smaller values are used, inductor current rises and a larger output capacitance may be required to suppress output ripple ...
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... GND). Buck Inductor The external components required for the buck are an inductor, input and output filter capacitors, and compensation RC network. The SGM2101 buck converter provides best efficiency with continuous inductor current. A reasonable inductor value (L ) can be derived from the following: IDEAL ...
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... R P OUT ESR calculated to be <10pF, it can be omitted. P AUX Controller Component Selection External MOSFET All SGM2101 AUX controllers drive external logic- level MOSFETs. Significant MOSFET selection parameters are as follows: • On-resistance (R ) DS(ON) • Maximum drain-to-source voltage (V • Total gate charge ( • ...
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... SGM2101 AUXA Boost, Continuous Inductor Current Continuous inductor current can sometimes improve boost efficiency by lowering the ratio between peak inductor current and output current. It does this at the expense of a larger inductance value that requires larger size for a given current rating. With continuous ...
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... The rest of the circuit is unchanged from Figure 1. Figure 3. Typical Operating Circuit for 2 AA Cells and 1-Cell Li+ The SGM2101 can also allow either 1-cell Li cells to power the same design. If the buck and main inputs are both connected to PVSU, then both the 3.3V and 1 ...
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... FB_ pin. Nodes with high dV/dt (switching nodes) should be kept as small as possible high-impedance nodes such as FB_. Refer to the plane containing the SGM2101 EV kit data sheet for a full PC board example. Five-Channel, High Efficiency, DC-DC Power Management Unit and should be routed ...
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... SGM2101 PACKAGE OUTLINE DIMENSIONS TQFN7×7-48L E TOP VIEW Symbol Micro Limited www.sg-micro.com Dimensions In Millimeters Min Max 0.700 0.800 0.000 0.050 0.203 REF 6.900 7.100 5.300 5.500 6.900 7.100 5.300 5.500 ...
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... SGM2101 09/2009 REV. A SGMICRO is dedicated to provide high quality and high performance analog IC products to customers. All SGMICRO products meet the highest industry standards with strict and comprehensive test and quality control systems to achieve world-class consistency and reliability. For information regarding SGMICRO Corporation and its products, see SG Micro Limited www ...