Datasheet LTC3121 (Analog Devices) - 22
| Hersteller | Analog Devices |
| Beschreibung | 15V, 1.5A Synchronous Step-Up DC/DC Converter with Output Disconnect |
| Seiten / Seite | 26 / 22 — Typical applicaTions. USB/Battery Powered Synchronous Boost Converter, … |
| Dateiformat / Größe | PDF / 973 Kb |
| Dokumentensprache | Englisch |
Typical applicaTions. USB/Battery Powered Synchronous Boost Converter, 4.3V to 5V, 500mA
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LTC3121
Typical applicaTions USB/Battery Powered Synchronous Boost Converter, 4.3V to 5V, 500mA
L1 3.3µH VIN 4.3V TO 5.5V SW VOUT VIN VOUT 5V VIN LTC3121 500mA 2V/DIV OFF ON SD C1 100nF R1 C2 CIN PWM/SYNC CAP 383k V 4.7µF 4.7µF OUT 2V/DIV RT FB COUT 47µF VCC VC R2 INPUT 121k RT CURRENT SGND PGND RC 57.6k 43.2k C 0.5A/DIV F CVCC C 68pF C 4.7µF 1nF 2ms/DIV 3121 TA06b RLOAD = 20Ω V C IN = USB 2.0 3121 TA06a IN, CVCC: 4.7µF, 6.3V, X7R, 1206 PORT HOTPLUGGED C1: 100nF, 6.3V, X7R, 1206 COUT: 47µF, 6.3V, X7R, 1812 C2: LELON VE-4R7M1ATR-0305 L1: TDK SPM6530T-3R3M
5V to Dual Output Synchronous Boost Converter, ±15V
L1 C2 6.8µH 470nF VIN –15.1 15.1 5V –15.0 15.0 SW VOUT1 –14.9 VOUT1 14.9 VIN VOUT 15V LTC3121 C1 –14.8 14.8 OFF ON SD U1 100nF –14.7 V 14.7 C R1 OUT1 IN PWM/SYNC CAP COUT1 (V) 4.7µF 1.3M 22µF –14.6 14.6 (V) RT FB V OUT2 –14.5 14.5 V R2 CC VC 113k –14.4 VOUT2 14.4 R V T SGND PGND RC OUT2 –15V –14.3 14.3 57.6k 365k CF COUT2 Z1 CVCC C 10pF –14.2 14.2 C 4.7µF 47µF 150pF –14.1 14.1 0 35 70 105 140 OUTPUT CURRENT (mA) C 3121 TA07a IN, CVCC: 4.7µF, 6.3V, X7R, 1206 3121 TA07b COUT2: 47µF, 16V, X7R, 1206 C1: 100nF, 6.3V, X7R, 1206 COUT1: 22µF, 16V, X7R, 1812 C2: 470nF, 25V, X7R, 1206 L1: COILCRAFT XAL5050-682ME U1: CENTRAL SEMICONDUCTOR CBAT54S Z1: DIODES, INC. DDZ16ASF-7 3121fa 22 For more information www.linear.com/LTC3121 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Package Description Typical Application Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Low Voltage Operation Low Noise Fixed Frequency Operation Burst Mode Operation Applications Information PCB Layout Guidelines Schottky Diode Component Selection Operating Frequency Selection Typical Applications Package Description Revision History Typical Application Related Parts
Typical applicaTions USB/Battery Powered Synchronous Boost Converter, 4.3V to 5V, 500mA
L1 3.3µH VIN 4.3V TO 5.5V SW VOUT VIN VOUT 5V VIN LTC3121 500mA 2V/DIV OFF ON SD C1 100nF R1 C2 CIN PWM/SYNC CAP 383k V 4.7µF 4.7µF OUT 2V/DIV RT FB COUT 47µF VCC VC R2 INPUT 121k RT CURRENT SGND PGND RC 57.6k 43.2k C 0.5A/DIV F CVCC C 68pF C 4.7µF 1nF 2ms/DIV 3121 TA06b RLOAD = 20Ω V C IN = USB 2.0 3121 TA06a IN, CVCC: 4.7µF, 6.3V, X7R, 1206 PORT HOTPLUGGED C1: 100nF, 6.3V, X7R, 1206 COUT: 47µF, 6.3V, X7R, 1812 C2: LELON VE-4R7M1ATR-0305 L1: TDK SPM6530T-3R3M
5V to Dual Output Synchronous Boost Converter, ±15V
L1 C2 6.8µH 470nF VIN –15.1 15.1 5V –15.0 15.0 SW VOUT1 –14.9 VOUT1 14.9 VIN VOUT 15V LTC3121 C1 –14.8 14.8 OFF ON SD U1 100nF –14.7 V 14.7 C R1 OUT1 IN PWM/SYNC CAP COUT1 (V) 4.7µF 1.3M 22µF –14.6 14.6 (V) RT FB V OUT2 –14.5 14.5 V R2 CC VC 113k –14.4 VOUT2 14.4 R V T SGND PGND RC OUT2 –15V –14.3 14.3 57.6k 365k CF COUT2 Z1 CVCC C 10pF –14.2 14.2 C 4.7µF 47µF 150pF –14.1 14.1 0 35 70 105 140 OUTPUT CURRENT (mA) C 3121 TA07a IN, CVCC: 4.7µF, 6.3V, X7R, 1206 3121 TA07b COUT2: 47µF, 16V, X7R, 1206 C1: 100nF, 6.3V, X7R, 1206 COUT1: 22µF, 16V, X7R, 1812 C2: 470nF, 25V, X7R, 1206 L1: COILCRAFT XAL5050-682ME U1: CENTRAL SEMICONDUCTOR CBAT54S Z1: DIODES, INC. DDZ16ASF-7 3121fa 22 For more information www.linear.com/LTC3121 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Package Description Typical Application Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Low Voltage Operation Low Noise Fixed Frequency Operation Burst Mode Operation Applications Information PCB Layout Guidelines Schottky Diode Component Selection Operating Frequency Selection Typical Applications Package Description Revision History Typical Application Related Parts