Datasheet LTC3528-2 (Analog Devices) - 7
| Hersteller | Analog Devices |
| Beschreibung | 1A, 2MHz Synchronous Step-Up DC/DC Converter in 2mm × 3mm DFN |
| Seiten / Seite | 18 / 7 — PIN FUNCTIONS SHDN (Pin 1):. SW (Pin 5):. FB (Pin 2):. PGND (Pin 6):. … |
| Dateiformat / Größe | PDF / 406 Kb |
| Dokumentensprache | Englisch |
PIN FUNCTIONS SHDN (Pin 1):. SW (Pin 5):. FB (Pin 2):. PGND (Pin 6):. SGND (Pin 7):. PGOOD (Pin 3):. VIN (Pin 8):. VOUT (Pin 4):
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Textversion des Dokuments
LTC3528-2
PIN FUNCTIONS SHDN (Pin 1):
Logic Controlled Shutdown Input. There is
SW (Pin 5):
Switch Pin. Connect inductor between SW an internal 4M pull-down resistor on this pin. and VIN. Keep PCB trace lengths as short and wide as • SHDN = High: Normal operation possible to reduce EMI. If the inductor current falls to • SHDN = Low: Shutdown, quiescent current < 1µA zero, or SHDN is low, an internal anti-ringing switch is connected from SW to VIN to minimize EMI.
FB (Pin 2):
Feedback Input. Connect resistor divider tap to this pin. The output voltage can be adjusted from 1.6V
PGND (Pin 6):
Power Ground. Provide a short direct PCB to 5.25V by: path between PGND and the (–) side of the input and output capacitors. R2 V
SGND (Pin 7):
Signal Ground. Provide a short direct PCB OUT = 1.20V • 1+ R1 path between SGND and the (–) side of the input and
PGOOD (Pin 3):
Power Good Comparator Output. This output capacitors. open-drain output is low when VFB < 10% from its regu-
VIN (Pin 8):
Battery Input Voltage. Connect a minimum of lation voltage. 1µF ceramic decoupling capacitor from this pin to ground.
VOUT (Pin 4):
Output Voltage Sense and Drain Connection
GND (Exposed Pad Pin 9): The exposed pad must be
of the Internal Synchronous Rectifier. PCB trace length
soldered to the PCB ground plane.
It serves as another from VOUT to the output filter capacitor (4.7µF minimum) ground connection and as a means of conducting heat should be as short and wide as possible. away from the die. 35282fb 7 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Related Parts
PIN FUNCTIONS SHDN (Pin 1):
Logic Controlled Shutdown Input. There is
SW (Pin 5):
Switch Pin. Connect inductor between SW an internal 4M pull-down resistor on this pin. and VIN. Keep PCB trace lengths as short and wide as • SHDN = High: Normal operation possible to reduce EMI. If the inductor current falls to • SHDN = Low: Shutdown, quiescent current < 1µA zero, or SHDN is low, an internal anti-ringing switch is connected from SW to VIN to minimize EMI.
FB (Pin 2):
Feedback Input. Connect resistor divider tap to this pin. The output voltage can be adjusted from 1.6V
PGND (Pin 6):
Power Ground. Provide a short direct PCB to 5.25V by: path between PGND and the (–) side of the input and output capacitors. R2 V
SGND (Pin 7):
Signal Ground. Provide a short direct PCB OUT = 1.20V • 1+ R1 path between SGND and the (–) side of the input and
PGOOD (Pin 3):
Power Good Comparator Output. This output capacitors. open-drain output is low when VFB < 10% from its regu-
VIN (Pin 8):
Battery Input Voltage. Connect a minimum of lation voltage. 1µF ceramic decoupling capacitor from this pin to ground.
VOUT (Pin 4):
Output Voltage Sense and Drain Connection
GND (Exposed Pad Pin 9): The exposed pad must be
of the Internal Synchronous Rectifier. PCB trace length
soldered to the PCB ground plane.
It serves as another from VOUT to the output filter capacitor (4.7µF minimum) ground connection and as a means of conducting heat should be as short and wide as possible. away from the die. 35282fb 7 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Related Parts