Datasheet LTC3035 (Analog Devices) - 5
| Hersteller | Analog Devices |
| Beschreibung | 300mA VLDO Linear Regulator with Charge Pump Bias Generator |
| Seiten / Seite | 12 / 5 — PI FU CTIO S. CP (Pin 1):. ADJ (Pin 6):. CM (Pin 2):. GND (Pin 3):. IN … |
| Dateiformat / Größe | PDF / 224 Kb |
| Dokumentensprache | Englisch |
PI FU CTIO S. CP (Pin 1):. ADJ (Pin 6):. CM (Pin 2):. GND (Pin 3):. IN (Pin 4):. SHDN (Pin 7):. BIAS (Pin 8):. OUT (Pin 5):
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LTC3035
U U U PI FU CTIO S CP (Pin 1):
Flying Capacitor Positive Terminal.
ADJ (Pin 6):
Adjust Input Pin. This is the input to the error amplifier. The ADJ pin reference voltage is 0.4V referenced
CM (Pin 2):
Flying Capacitor Negative Terminal. to ground. The output voltage range is 0.4V to 3.6V and is
GND (Pin 3):
Ground. Connect to a ground plane. set by connecting ADJ to a resistor divider from OUT to
IN (Pin 4):
Input Supply Voltage. The output load current GND. is supplied directly from IN. The IN pin should be locally
SHDN (Pin 7):
Shutdown Input, Active Low. This pin is bypassed to ground if the LTC3035 is more than a few used to put the LTC3035 into shutdown. The SHDN pin inches away from another source of bulk capacitance. In current is typically less than 10nA. The SHDN pin cannot general, the output impedance of a battery rises with be left floating and must be tied to a valid logic level if frequency, so it is usually adviseable to include an input not used. bypass capacitor when supplying IN from a battery. A
BIAS (Pin 8):
BIAS Output Voltage Pin. BIAS is the output capacitor of 1µF is usually sufficient. of the charge pump and provides the high side supply for
OUT (Pin 5):
Regulated Output Voltage. The OUT pin the LTC3035 LDO circuitry. This pin should be locally supplies power to the load. A minimum ceramic output bypassed to ground by a 1µF or greater capacitor as close capacitor of at least 1µF is required to ensure stability. as possible to the pin. Nothing else should be connected Larger output capacitors may be required for applications to this pin. with large transient loads to limit peak voltage transients.
Exposed Pad (Pin 9):
Ground and Heat Sink. Must be See the Applications Information section for more infor- soldered to PCB ground plane or large pad for optimal mation on output capacitance. thermal performance.
W BLOCK DIAGRA
BIAS 8 – 800kHz EN OSCILLATOR 5V + VMIN 1.9 • VIN CHARGE CP PUMP 1 VIN 4 CM 2 SOFT-START BIAS REFERENCE SHDN + 7 SHDN 0.400V – OUT 5 2.5k BIAS UVLO GND ADJ 6 PINS 3, 9 3035 BD 3035f 5
U U U PI FU CTIO S CP (Pin 1):
Flying Capacitor Positive Terminal.
ADJ (Pin 6):
Adjust Input Pin. This is the input to the error amplifier. The ADJ pin reference voltage is 0.4V referenced
CM (Pin 2):
Flying Capacitor Negative Terminal. to ground. The output voltage range is 0.4V to 3.6V and is
GND (Pin 3):
Ground. Connect to a ground plane. set by connecting ADJ to a resistor divider from OUT to
IN (Pin 4):
Input Supply Voltage. The output load current GND. is supplied directly from IN. The IN pin should be locally
SHDN (Pin 7):
Shutdown Input, Active Low. This pin is bypassed to ground if the LTC3035 is more than a few used to put the LTC3035 into shutdown. The SHDN pin inches away from another source of bulk capacitance. In current is typically less than 10nA. The SHDN pin cannot general, the output impedance of a battery rises with be left floating and must be tied to a valid logic level if frequency, so it is usually adviseable to include an input not used. bypass capacitor when supplying IN from a battery. A
BIAS (Pin 8):
BIAS Output Voltage Pin. BIAS is the output capacitor of 1µF is usually sufficient. of the charge pump and provides the high side supply for
OUT (Pin 5):
Regulated Output Voltage. The OUT pin the LTC3035 LDO circuitry. This pin should be locally supplies power to the load. A minimum ceramic output bypassed to ground by a 1µF or greater capacitor as close capacitor of at least 1µF is required to ensure stability. as possible to the pin. Nothing else should be connected Larger output capacitors may be required for applications to this pin. with large transient loads to limit peak voltage transients.
Exposed Pad (Pin 9):
Ground and Heat Sink. Must be See the Applications Information section for more infor- soldered to PCB ground plane or large pad for optimal mation on output capacitance. thermal performance.
W BLOCK DIAGRA
BIAS 8 – 800kHz EN OSCILLATOR 5V + VMIN 1.9 • VIN CHARGE CP PUMP 1 VIN 4 CM 2 SOFT-START BIAS REFERENCE SHDN + 7 SHDN 0.400V – OUT 5 2.5k BIAS UVLO GND ADJ 6 PINS 3, 9 3035 BD 3035f 5