Datasheet HMC1060LP3E (Analog Devices) - 10
| Manufacturer | Analog Devices |
| Description | Quad Low Noise High PSRR Linear Voltage Regulator |
| Pages / Page | 16 / 10 — HMC1060LP3E. QUAD LOW NOISE HIGH PSRR. LINEAR VOLTAGE REGULATOR. Theory … |
| File Format / Size | PDF / 1.3 Mb |
| Document Language | English |
HMC1060LP3E. QUAD LOW NOISE HIGH PSRR. LINEAR VOLTAGE REGULATOR. Theory Of Operation. Thermal Protection
Model Line for this Datasheet
Text Version of Document
HMC1060LP3E
v00.1211
QUAD LOW NOISE HIGH PSRR LINEAR VOLTAGE REGULATOR Theory Of Operation
HMC1060LP3e is a four output ultra low noise regulator. the four outputs can be configured to supply anywhere from 1.8 V to 5.2 V. three outputs (Vr1, Vr2, and Vr3) are configured to supply 3.3 V by default, and have a different maximum current rating. Vr1 is rated at 100 mA maximum, and Vr2 and Vr3 are rated at a maximum of 50 mA t each. the fourth output, Vr4, is configured to supply 5 V by default, and is rated at 300 mA maximum current. details M specifying various configuration options are available in output Voltage Configuration section. default configuration is shown in Application Schematic section. the HMC1060LP3e includes a number of features including: g - S • thermal Protection feature that disables the outputs of the HMC1060LP3e when the device temperature reaches a critical temperature. More details are available thermal Protection section. in n • PtAt (Proportional to Absolute temperature) feature that can be enabled or disabled via an external PtAtB pin of the HMC1060LP3e. PtAt feature, when enabled, scales the output voltage with device temperature in order to io supply optimal supply voltage and current at each temperature in order to maximize the performance of devices it supplied by the HMC1060LP3e. More information about PtAt feature is available in PtAt Feature and Benefits d of PtAt sections. n
Thermal Protection
o the thermal protection circuitry of the HMC1060LP3e disables the outputs when junction temperature rises to approximately +150°C. the outputs are kept disabled until the junction temperature cools down by approximately 15°C. the outputs are then re-enabled. r C e in cases where ambient temperature and/or power dissipation are sufficiently high to re-heat the HMC1060LP3e repeatedly to +150°C, the thermal protection feature of the HMC1060LP3e will repeat. As a result the thermal w protection feature will cycle the outputs on and off, protecting the HMC1060LP3e and the components it supplies o from damage. After the overloads, or other fault conditions are removed/changed, the HMC1060LP3e output will P return to normal operation. if a momentary short-circuit occurs at the output, the associated increase in temperature may activate the thermal protection circuitry, protecting the HMC1060LP3e and the components it supplies. the device is not protected from short circuit events lasting longer than 10 seconds. operation at Absolute Maximum ratings levels may damage the HMC1060LP3e immediately. reliable, long term operation requires adherence to electrical Specifications.
Stability Considerations
A regulator is a feedback system. A large capacitor with low eSr (equivalent Series resistance) may affect the feedback dynamics and can result in unstable operation or noise peaking. two approaches are recommended to ensure regulator stability: 1. if only one decoupling capacitor is used at the output, the chosen capacitor must have an eSr as defined in the Stability requirements table below. this guarantees stability over al loading conditions with the chosen decoupling capacitor. 2. in the case where several capacitors are connected at the output (which is often the case with noise and spurious emission sensitive circuits), the recommended approach is to insert a small resistor in series with the load after the 100 nF feedback capacitor (0.1 Ω resistances shown in the Application Schematic). recommended eSr values are shown in the Stability requirements table below.
Stability Requirements
recommended equivalent Series total Capacitance at Vrx resistance 0.1 µF to 1 µF 200 mΩ > 1 µF 100 mΩ Inf F or o m r p atio r n ifc ur e n , d ishe e d lbiv y e A r n y a alog n D d t evic o p es is la beclie o eved rd to ebre sa: H ccur iattti e tae M nd re ilicarbloew . H a o ve C wever, o n rp o For price, delivery, and to place orders: Analog Devices, Inc., responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other oration, 2 Elizabeth Drive, Chelmsford, MA 01824 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106 Phone: 978-250-3343 Fax: 978-250-3373 O rights of third parties that may result from its use. Specifications subject to change without notice. No P rd ho e ne r O : 7 n 81- -3li 2n 9 e a -47 t w 0 w 0 • O w rd .h e it r o tniltie n .c e ao t m license is granted by implication or otherwise under any patent or patent rights of Analog Devices. www.analog.com
10
Application Support: Pho Trademarks and registered trademarks are the property of their respective owners. ne: 978-250-33 A 4 p 3 o plica r a tio p n S p u s p @ po h rt itt : P ite ho . n c e o : 1m -800-ANALOG-D
v00.1211
QUAD LOW NOISE HIGH PSRR LINEAR VOLTAGE REGULATOR Theory Of Operation
HMC1060LP3e is a four output ultra low noise regulator. the four outputs can be configured to supply anywhere from 1.8 V to 5.2 V. three outputs (Vr1, Vr2, and Vr3) are configured to supply 3.3 V by default, and have a different maximum current rating. Vr1 is rated at 100 mA maximum, and Vr2 and Vr3 are rated at a maximum of 50 mA t each. the fourth output, Vr4, is configured to supply 5 V by default, and is rated at 300 mA maximum current. details M specifying various configuration options are available in output Voltage Configuration section. default configuration is shown in Application Schematic section. the HMC1060LP3e includes a number of features including: g - S • thermal Protection feature that disables the outputs of the HMC1060LP3e when the device temperature reaches a critical temperature. More details are available thermal Protection section. in n • PtAt (Proportional to Absolute temperature) feature that can be enabled or disabled via an external PtAtB pin of the HMC1060LP3e. PtAt feature, when enabled, scales the output voltage with device temperature in order to io supply optimal supply voltage and current at each temperature in order to maximize the performance of devices it supplied by the HMC1060LP3e. More information about PtAt feature is available in PtAt Feature and Benefits d of PtAt sections. n
Thermal Protection
o the thermal protection circuitry of the HMC1060LP3e disables the outputs when junction temperature rises to approximately +150°C. the outputs are kept disabled until the junction temperature cools down by approximately 15°C. the outputs are then re-enabled. r C e in cases where ambient temperature and/or power dissipation are sufficiently high to re-heat the HMC1060LP3e repeatedly to +150°C, the thermal protection feature of the HMC1060LP3e will repeat. As a result the thermal w protection feature will cycle the outputs on and off, protecting the HMC1060LP3e and the components it supplies o from damage. After the overloads, or other fault conditions are removed/changed, the HMC1060LP3e output will P return to normal operation. if a momentary short-circuit occurs at the output, the associated increase in temperature may activate the thermal protection circuitry, protecting the HMC1060LP3e and the components it supplies. the device is not protected from short circuit events lasting longer than 10 seconds. operation at Absolute Maximum ratings levels may damage the HMC1060LP3e immediately. reliable, long term operation requires adherence to electrical Specifications.
Stability Considerations
A regulator is a feedback system. A large capacitor with low eSr (equivalent Series resistance) may affect the feedback dynamics and can result in unstable operation or noise peaking. two approaches are recommended to ensure regulator stability: 1. if only one decoupling capacitor is used at the output, the chosen capacitor must have an eSr as defined in the Stability requirements table below. this guarantees stability over al loading conditions with the chosen decoupling capacitor. 2. in the case where several capacitors are connected at the output (which is often the case with noise and spurious emission sensitive circuits), the recommended approach is to insert a small resistor in series with the load after the 100 nF feedback capacitor (0.1 Ω resistances shown in the Application Schematic). recommended eSr values are shown in the Stability requirements table below.
Stability Requirements
recommended equivalent Series total Capacitance at Vrx resistance 0.1 µF to 1 µF 200 mΩ > 1 µF 100 mΩ Inf F or o m r p atio r n ifc ur e n , d ishe e d lbiv y e A r n y a alog n D d t evic o p es is la beclie o eved rd to ebre sa: H ccur iattti e tae M nd re ilicarbloew . H a o ve C wever, o n rp o For price, delivery, and to place orders: Analog Devices, Inc., responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other oration, 2 Elizabeth Drive, Chelmsford, MA 01824 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106 Phone: 978-250-3343 Fax: 978-250-3373 O rights of third parties that may result from its use. Specifications subject to change without notice. No P rd ho e ne r O : 7 n 81- -3li 2n 9 e a -47 t w 0 w 0 • O w rd .h e it r o tniltie n .c e ao t m license is granted by implication or otherwise under any patent or patent rights of Analog Devices. www.analog.com
10
Application Support: Pho Trademarks and registered trademarks are the property of their respective owners. ne: 978-250-33 A 4 p 3 o plica r a tio p n S p u s p @ po h rt itt : P ite ho . n c e o : 1m -800-ANALOG-D
