# US 12,113,487 B2 · Jump-start power amplifier boost converter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,113,487 B2 - Document ID: US12113487B2 - Status: Granted - Kind: B2 - Application number: 17/930,561 - Filed: 2022-09-08 - Published: 2023-03-09 - Granted: 2024-10-08 - Earliest claimed: 2019-10-03 - Assignees: Skyworks Solutions, Inc. - Applicants: Skyworks Solutions, Inc. - Inventors: Wendy Ng; James Jason LoCascio - Web page: https://patentgrep.com/patent/US12113487B2 ## CPC - H03F 1/305: {in case of switching on or off of a power supply} - H02M 1/143: {using compensating arrangements (for reducing noise from the supply in transmission systems H04B15/005)} - H02M 1/36: Means for starting or stopping converters - H02M 3/157: with digital control - H02M 3/158: including plural semiconductor devices as final control devices for a single load - H03F 1/0227: {using supply converters} - H03F 1/0266: {by using a signal derived from the input signal} - H03F 3/195: in integrated circuits - H03F 3/20: Power amplifiers, e.g. Class B amplifiers, Class C amplifiers (H03F3/26 - H03F3/30 take precedence) - H03F 3/24: of transmitter output stages - H03F 3/245: {with semiconductor devices only} - H04B 1/04: Circuits - H04B 1/40: Circuits - H03F 2200/102: A non-specified detector of a signal envelope being used in an amplifying circuit - H03F 2200/451: the amplifier being a radio frequency amplifier - H04B 2001/0408: {with power amplifiers} - H03F: AMPLIFIERS - H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P) - H04B: TRANSMISSION ## Abstract A power management integrated circuit (PMIC) can improve the ramp up speed of a boost converter with the inclusion of a controllable switch that may modify the connection of an output capacitor to reduce the ramp time as the output voltage is ramping to a desired boost setpoint. The switch may be controlled using jump start logic to switch a first plate or terminal of the output capacitor from a ground connection to a voltage supply connection. Once a threshold voltage is reached, the first plate of the capacitor may be switched from the supply voltage to ground. In certain cases, by switching the connection of the output capacitor between ground and a supply voltage based on one or more threshold voltages or a boost setpoint, the time to ramp from an initial voltage to a desired boost setpoint may be reduced. ## Claims ### Claim 1 A power management integrated circuit comprising: an output capacitor with a first plate of the output capacitor connected to a powered circuit element configured to obtain power from the power management integrated circuit; a jump-start circuit configured to connect a second plate of the output capacitor to one of a ground or a supply voltage based at least in part on a determination of a difference between a boost setpoint of a first boost converter and an output voltage of the power management integrated circuit; and a first switch configured to connect a bias supply between the ground and the supply voltage. ### Claim 2 (depends on 1) The power management integrated circuit of claim 1 wherein the powered circuit element comprises a power amplifier. ### Claim 3 (depends on 1) The power management integrated circuit of claim 1 further comprising the first boost converter, the output capacitor configured to output a voltage of the first boost converter. ### Claim 4 (depends on 3) The power management integrated circuit of claim 3 wherein the voltage of the first boost converter is between 8 to 13 volts. ### Claim 5 (depends on 1) The power management integrated circuit of claim 1 wherein the bias supply comprises a second boost converter configured to output a voltage. ### Claim 6 (depends on 5) The power management integrated circuit of claim 5 wherein the voltage of the second boost converter is 4.5 volts. ### Claim 7 (depends on 1) The power management integrated circuit of claim 1 wherein the jump-start circuit connects the second plate of the output capacitor to the ground when the boost setpoint of the first boost converter is determined to be a first threshold voltage below the output voltage. ### Claim 8 (depends on 1) The power management integrated circuit of claim 1 wherein the jump-start circuit connects the second plate of the output capacitor to the supply voltage when the boost setpoint of the first boost converter is determined to satisfy a second threshold voltage. ### Claim 9 (depends on 1) The power management integrated circuit of claim 1 further comprising a sensing circuit configured to determine the output voltage of the first boost converter. ### Claim 10 (depends on 1) The power management integrated circuit of claim 1 wherein the jump-start circuit includes a second switch configured to connect the second plate of the output capacitor to the one of the ground or the supply voltage. ### Claim 11 (depends on 10) The power management integrated circuit of claim 10 wherein the second switch has a 100 milliohm equivalent series resistance. ### Claim 12 (depends on 10) The power management integrated circuit of claim 10 wherein the jump-start circuit includes jump-start logic configured to control the second switch based at least in part on the boost setpoint of the first boost converter. ### Claim 13 (depends on 10) The power management integrated circuit of claim 10 wherein the jump-start circuit further includes an interface circuit configured to receive an indication of the boost setpoint. ### Claim 14 A power amplifier module comprising: a power amplifier; and a power management integrated circuit configured to supply a voltage to the power amplifier, the power management integrated circuit including an output capacitor, a jump-start circuit, and a first switch, a first plate of the output capacitor connected to the power amplifier, the power amplifier configured to obtain power from the power management integrated circuit, the jump-start circuit configured to connect a second plate of the output capacitor to one of a ground or a supply voltage based at least in part on a determination of a difference between a boost setpoint of a first boost converter and an output voltage of the power management integrated circuit, and the first switch configured to connect a bias supply between the ground and the supply voltage. ### Claim 15 (depends on 14) The power amplifier module of claim 14 wherein the power management integrated circuit further includes the first boost converter and the output capacitor is configured to output a voltage of the first boost converter. ### Claim 16 (depends on 14) The power amplifier module of claim 14 wherein the bias supply comprises a second boost converter configured to output a voltage. ### Claim 17 (depends on 14) The power amplifier module of claim 14 wherein the jump-start circuit connects the second plate of the output capacitor to the ground when the boost setpoint of the first boost converter is determined to be a first threshold voltage below the output voltage. ### Claim 18 (depends on 14) The power amplifier module of claim 14 wherein the jump-start circuit connects the second plate of the output capacitor to the supply voltage when the boost setpoint of the first boost converter is determined to satisfy a second threshold voltage. ### Claim 19 (depends on 14) The power amplifier module of claim 14 wherein the jump-start circuit includes a second switch configured to connect the second plate of the output capacitor to the one of the ground or the supply voltage. ### Claim 20 A wireless device comprising: a transceiver configured to transmit one or more radio frequency signals via an antenna; and a power amplifier module configured to amplify the one or more radio frequency signals prior to transmission by the transceiver, the power amplifier module including a power amplifier and a power management integrated circuit configured to supply a voltage to the power amplifier, the power management integrated circuit including an output capacitor, a jump-start circuit, and a first switch, a first plate of the output capacitor connected to the power amplifier, the power amplifier configured to obtain power from the power management integrated circuit, the jump-start circuit configured to connect a second plate of the output capacitor to one of a ground or a supply voltage based at least in part on a determination of a difference between a boost setpoint of a first boost converter and an output voltage of the power management integrated circuit, and the first switch configured to connect a bias supply between the ground and the supply voltage.