Datasheet LT8653S (Analog Devices) - 7
| Hersteller | Analog Devices |
| Beschreibung | Dual Channel 2A, 42V, Synchronous Step-Down Silent Switcher 2 with 6.2μA Quiescent Current |
| Seiten / Seite | 32 / 7 — TYPICAL PERFORMANCE CHARACTERISTICS. RT Programmed Switching. PG High … |
| Revision | A |
| Dateiformat / Größe | PDF / 2.2 Mb |
| Dokumentensprache | Englisch |
TYPICAL PERFORMANCE CHARACTERISTICS. RT Programmed Switching. PG High Thresholds. PG Low Thresholds. Frequency
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LT8653S
TYPICAL PERFORMANCE CHARACTERISTICS RT Programmed Switching PG High Thresholds PG Low Thresholds Frequency
10.0 –5.0 150 9.5 (%) –5.5 (%) 135 REF 9.0 REF –6.0 120 8.5 –6.5 105 8.0 –7.0 90 7.5 –7.5 75 7.0 –8.0 60 6.5 –8.5 45 RT PIN RESISTOR (kΩ) 6.0 –9.0 30 5.5 PG THRESHOLD OFFSET FROM V –9.5 PG THRESHOLD OFFSET FROM V 15 RISING FALLING 5.0 –10.0 0 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 0 0.5 1 1.5 2 2.5 3 TEMPERATURE (°C) TEMPERATURE (°C) SWITCHING FREQUENCY (MHZ) 8653S G27 8653S G28 8653S G31
Minimum Input Voltage Bias Pin Current per Channel Bias Pin Current per Channel
3.0 6.6 10 fSW = 2MHz VIN = 12V 6.4 LOAD = 2A 9 LOAD = 2A 2.8 6.2 8 6.0 7 2.6 5.8 6 TAGE (V) 5.6 5 2.4 5.4 4 INPUT VOL 5.2 3 BIAS PIN CURRENT (mA) BIAS PIN CURRENT (mA) 2.2 5.0 2 4.8 1 2.0 4.6 0 –55 –25 5 35 65 95 125 155 5 10 15 20 25 30 35 40 45 0 0.5 1 1.5 2 2.5 3 TEMPERATURE (°C) INPUT VOLTAGE (V) SWITCHING FREQUENCY (MHZ) 8653S G32 8653S G31 8653S G32
Transient Response: Internal Transient Response: Internal Transient Response: External Compensation Compensation with Internal 2MHz fSW Compensation
IL IL IL 1A/DIV 1A/DIV 1A/DIV VOUT VOUT VOUT 100mV/DIV 100mV/DIV 100mV/DIV 40ms/DIV 8653S G33 40ms/DIV 8653S G34 40ms/DIV 8653S G35 0A TO 1A TRANSIENT 0A TO 1A TRANSIENT 0A TO 1A TRANSIENT 3.3VOUT, D0 = D1 = 0V 3.3VOUT, D0 = D1 = 0V 3.3VOUT, D0 = D1 = 0V COUT = 100µF COUT = 100µF COUT = 100µF FCM, fSW = 2MHz (RT = 15kΩ) FCM, fSW = 2MHz (RT = VCC) FCM, fSW = 2MHz (RT = 15kΩ) CC = 470pF, RC = 34.8kΩ Rev. A For more information www.analog.com 7 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS RT Programmed Switching PG High Thresholds PG Low Thresholds Frequency
10.0 –5.0 150 9.5 (%) –5.5 (%) 135 REF 9.0 REF –6.0 120 8.5 –6.5 105 8.0 –7.0 90 7.5 –7.5 75 7.0 –8.0 60 6.5 –8.5 45 RT PIN RESISTOR (kΩ) 6.0 –9.0 30 5.5 PG THRESHOLD OFFSET FROM V –9.5 PG THRESHOLD OFFSET FROM V 15 RISING FALLING 5.0 –10.0 0 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 0 0.5 1 1.5 2 2.5 3 TEMPERATURE (°C) TEMPERATURE (°C) SWITCHING FREQUENCY (MHZ) 8653S G27 8653S G28 8653S G31
Minimum Input Voltage Bias Pin Current per Channel Bias Pin Current per Channel
3.0 6.6 10 fSW = 2MHz VIN = 12V 6.4 LOAD = 2A 9 LOAD = 2A 2.8 6.2 8 6.0 7 2.6 5.8 6 TAGE (V) 5.6 5 2.4 5.4 4 INPUT VOL 5.2 3 BIAS PIN CURRENT (mA) BIAS PIN CURRENT (mA) 2.2 5.0 2 4.8 1 2.0 4.6 0 –55 –25 5 35 65 95 125 155 5 10 15 20 25 30 35 40 45 0 0.5 1 1.5 2 2.5 3 TEMPERATURE (°C) INPUT VOLTAGE (V) SWITCHING FREQUENCY (MHZ) 8653S G32 8653S G31 8653S G32
Transient Response: Internal Transient Response: Internal Transient Response: External Compensation Compensation with Internal 2MHz fSW Compensation
IL IL IL 1A/DIV 1A/DIV 1A/DIV VOUT VOUT VOUT 100mV/DIV 100mV/DIV 100mV/DIV 40ms/DIV 8653S G33 40ms/DIV 8653S G34 40ms/DIV 8653S G35 0A TO 1A TRANSIENT 0A TO 1A TRANSIENT 0A TO 1A TRANSIENT 3.3VOUT, D0 = D1 = 0V 3.3VOUT, D0 = D1 = 0V 3.3VOUT, D0 = D1 = 0V COUT = 100µF COUT = 100µF COUT = 100µF FCM, fSW = 2MHz (RT = 15kΩ) FCM, fSW = 2MHz (RT = VCC) FCM, fSW = 2MHz (RT = 15kΩ) CC = 470pF, RC = 34.8kΩ Rev. A For more information www.analog.com 7 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts