Datasheet LT3383 (Analog Devices) - 10
| Hersteller | Analog Devices |
| Beschreibung | Multioutput Power Management Solution with 4 Buck Switching and 3 LDO Linear Regulators |
| Seiten / Seite | 18 / 10 — PIN FUNCTIONS FB_B3 (Pin 25):. EN_B3 (Pin 34):. PVIN3 (Pin 35):. GND (Pin … |
| Dateiformat / Größe | PDF / 1.2 Mb |
| Dokumentensprache | Englisch |
PIN FUNCTIONS FB_B3 (Pin 25):. EN_B3 (Pin 34):. PVIN3 (Pin 35):. GND (Pin 26):. IN (Pin 27):. PVIN4 (Pin 36):. GND (Pin 28):
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LT3383
PIN FUNCTIONS FB_B3 (Pin 25):
Feedback Input for Step-Down Switching
EN_B3 (Pin 34):
Enable Step-Down Switching Regulator 3. Regulator 3. Set output voltage using resistor divider con- Active high input enables step-down switching regulator 3. nected from the output of step-down switching regulator A weak pull-down pulls EN_B3 low when left floating. 3 to this pin to ground.
PVIN3 (Pin 35):
Power Input for Step-Down Switching
GND (Pin 26):
Ground. Regulator 3. Tie this pin to VIN supply. This pin should
V
be bypassed to ground with a 10μF or greater ceramic
IN (Pin 27):
Supply Voltage Input. This pin should be bypassed to ground with a 1μF or greater ceramic capaci- capacitor. tor. All switching regulator PVIN supplies should be tied
PVIN4 (Pin 36):
Power Input for Step-Down Switching to VIN. Regulator 4. Tie this pin to VIN supply. This pin should
GND (Pin 28):
Ground. be bypassed to ground with a 10μF or greater ceramic capacitor.
GND (Pin 29):
Ground.
EN_B4 (Pin 37):
Enable Step-Down Switching Regulator 4.
EN_L2 (Pin 30):
Enable LDO2 Input. Active high enables Active high enables step-down switching regulator 4. A LDO2. A weak pul -down pul s EN_L2 low when left week pull-down pulls EN_B4 low when left floating. floating.
GND (Pin 38):
Ground.
SW3 (Pin 31):
Switch Pin for Step-Down Switching Regulator 3. Connect one side of step-down switching
PGOOD (Pin 39):
Power Good Output. Open-drain output regulator 3 inductor to this pin. pulls low when any enabled regulator falls below power good threshold. Pulls low when all regulators are disabled.
GND (Pin 32):
Ground.
SW4 (Pin 40):
Switch Pin for Step-Down Switching
GND (Pin 33):
Ground. Regulator 4. Connect one side of step-down switching regulator 4 inductor to this pin.
GND (Exposed Pad Pin 41):
Ground. The exposed pad must be connected to a continuous ground plane of the printed circuit board by multiple interconnect vias directly under the LT3383 to maximize electrical and thermal conduction. Rev. 0 10 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Introduction Step-Down Switching Regulators Power On Sequencing Fault Detection and Reporting Applications Information Thermal Considerations and Board Layout Typical Applications Package Description Typical Application Related Parts
PIN FUNCTIONS FB_B3 (Pin 25):
Feedback Input for Step-Down Switching
EN_B3 (Pin 34):
Enable Step-Down Switching Regulator 3. Regulator 3. Set output voltage using resistor divider con- Active high input enables step-down switching regulator 3. nected from the output of step-down switching regulator A weak pull-down pulls EN_B3 low when left floating. 3 to this pin to ground.
PVIN3 (Pin 35):
Power Input for Step-Down Switching
GND (Pin 26):
Ground. Regulator 3. Tie this pin to VIN supply. This pin should
V
be bypassed to ground with a 10μF or greater ceramic
IN (Pin 27):
Supply Voltage Input. This pin should be bypassed to ground with a 1μF or greater ceramic capaci- capacitor. tor. All switching regulator PVIN supplies should be tied
PVIN4 (Pin 36):
Power Input for Step-Down Switching to VIN. Regulator 4. Tie this pin to VIN supply. This pin should
GND (Pin 28):
Ground. be bypassed to ground with a 10μF or greater ceramic capacitor.
GND (Pin 29):
Ground.
EN_B4 (Pin 37):
Enable Step-Down Switching Regulator 4.
EN_L2 (Pin 30):
Enable LDO2 Input. Active high enables Active high enables step-down switching regulator 4. A LDO2. A weak pul -down pul s EN_L2 low when left week pull-down pulls EN_B4 low when left floating. floating.
GND (Pin 38):
Ground.
SW3 (Pin 31):
Switch Pin for Step-Down Switching Regulator 3. Connect one side of step-down switching
PGOOD (Pin 39):
Power Good Output. Open-drain output regulator 3 inductor to this pin. pulls low when any enabled regulator falls below power good threshold. Pulls low when all regulators are disabled.
GND (Pin 32):
Ground.
SW4 (Pin 40):
Switch Pin for Step-Down Switching
GND (Pin 33):
Ground. Regulator 4. Connect one side of step-down switching regulator 4 inductor to this pin.
GND (Exposed Pad Pin 41):
Ground. The exposed pad must be connected to a continuous ground plane of the printed circuit board by multiple interconnect vias directly under the LT3383 to maximize electrical and thermal conduction. Rev. 0 10 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Introduction Step-Down Switching Regulators Power On Sequencing Fault Detection and Reporting Applications Information Thermal Considerations and Board Layout Typical Applications Package Description Typical Application Related Parts