參數(shù)資料
型號(hào): LTC3614IUDD#PBF
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: 10.5 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PQCC24
封裝: 3 X 5 MM, LEAD FREE, PLASTIC, QFN-24
文件頁數(shù): 29/30頁
文件大?。?/td> 438K
代理商: LTC3614IUDD#PBF
LTC3614
8
3614fa
PIN FUNCTIONS
SRLIM/DDR (Pin 1): Slew Rate Limit. Tying this pin to
ground selects maximum slew rate. Minimum slew rate
is selected when the pin is open. Connecting a resistor
from SRLIM/DDR to ground allows the slew rate to be
continuously adjusted. If SRLIM/DDR is tied to SVIN, DDR
mode is selected. In DDR mode the slew rate limit is set
to maximum.
RT/SYNC (Pin 2): Oscillator Frequency. This pin provides
three ways of setting the constant switching frequency:
1. Connecting a resistor from RT/SYNC to ground will set
the switching frequency based on the resistor value.
2. Driving the RT/SYNC pin with an external clock signal
will synchronize the LTC3614 to the applied frequency.
The slope compensation is automatically adapted to the
external clock frequency.
3. Tying the RT/SYNC pin to SVIN enables the internal
2.25MHz oscillator frequency.
SGND (Pin 3): Signal Ground. All small-signal and compen-
sation components should connect to this ground, which
in turn should connect to PGND at a single point.
PVIN (Pins 4, 10, 11, 17): Power Input Supply. PVIN con-
nects to the source of the internal P-channel power MOSFET.
This pin is independent of SVIN and may be connected to
the same voltage or to a lower voltage supply.
SW (Pins 5, 6, 7, 8, 13, 14, 15, 16): Switch Node. Con-
nection to the inductor. These pins connect to the drains
of the internal power MOSFET switches.
NC (Pins 9, 12): Can be connected to ground or left
open.
SVIN (Pin 18): Signal Input Supply. This pin powers
the internal control circuitry and is monitored by the
undervoltage lockout comparator.
Start-Up from Shutdown with
Prebiased Output (Overvoltage)
(Forced Continuous Mode)
Output Voltage During Sinking
vs Input Voltage (VOUT = 1.8V,
0.47μH Inductor)
TYPICAL PERFORMANCE CHARACTERISTICS V
IN = 3.3V, RT/SYNC = SVIN unless otherwise noted.
VOUT
500mV/DIV
PGOOD
5V/DIV
IL
5A/DIV
50μs/DIV
3614 G31
PREBIASED VOUT = 2.2V
VOUT = 1.2V, IOUT = 0A
VMODE = 1.5V
INPUT VOLTAGE (V)
V
OUT
(V)
1.86
1.84
1.82
1.80
1.78
1.88
2.25
4
1.74
1.76
3.25
2.75
4.5
5.25
3614 G32
–3A, 2MHz, 120°C
–3A, 2MHz, 25°C
相關(guān)PDF資料
PDF描述
LTC3614EUDD#PBF 10.5 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PQCC24
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