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参数资料
| 型号： | LTC6992CDCB6-2#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, PDSO6 |
| 封装： | 2 X 3 MM, LEAD FREE, PLASTIC, MO-229TBD, DFN-6 |
| 文件页数： | 4/32页 |
| 文件大小： | 322K |
| 代理商： | LTC6992CDCB6-2#PBF |
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LTC6992-1/LTC6992-2/
LTC6992-3/LTC6992-4
12
69921234p
PIN FUNCTIONS
V+ (Pin 1/Pin 5): Supply Voltage (2.25V to 5.5V). This sup-
ply must be kept free from noise and ripple. It should be
bypassed directly to the GND pin with a 0.1μF capacitor.
DIV (Pin 2/Pin 4): Programmable Divider and Polarity
Input. A V+ referenced A/D converter monitors the DIV
pin voltage (VDIV) to determine a 4-bit result (DIVCODE).
VDIV may be generated by a resistor divider between V+
and GND. Use 1% resistors to ensure an accurate result.
The DIV pin and resistors should be shielded from the
OUT pin or any other traces that have fast edges. Limit the
capacitance on the DIV pin to less than 100pF so that VDIV
settles quickly. The MSB of DIVCODE (POL) determines
if the PWM signal is inverted before driving the output.
Setting POL = 1 results in a negative transfer function
(duty cycle decreasing as VMOD increases).
SET (Pin 3/Pin 3): Frequency-Setting Input. The voltage
on the SET pin (VSET) is regulated to 1V above GND. The
amount of current sourced from the SET pin (ISET) pro-
grams the master oscillator frequency. The ISET current
range is 1.25μA to 20μA. The output oscillation will stop
if ISET drops below approximately 500nA. A resistor con-
nected between SET and GND is the most accurate way to
set the frequency. For best performance, use a precision
metal or thin film resistor of 0.5% or better tolerance and
50ppm/°C or better temperature coefficient. For lower ac-
curacy applications an inexpensive 1% thick film resistor
may be used.
Limit the capacitance on the SET pin to less than 10pF
to minimize jitter and ensure stability. Capacitance less
than 100pF maintains the stability of the feedback circuit
regulating the VSET voltage.
(DCB/S6)
TYPICAL PERFORMANCE CHARACTERISTICS
Typical Start-Up, POL = 0
Typical Start-Up, POL = 1
V+
1V/DIV
OUT
1V/DIV
V+ = 2.5V
DIVCODE = 3 (÷64)
RSET = 50k
VMOD = 0.3V (~25% DUTY CYCLE)
100μs/DIV
6992 G53
500μs
V+
1V/DIV
OUT
1V/DIV
V+ = 2.5V
DIVCODE = 12 (÷64, POL = 1)
RSET = 50k
VMOD = 0.2V (~87.5% DUTY CYCLE)
100μs/DIV
6992 G54
500μs
6992 PF
LTC6992
MOD
GND
SET
OUT
V+
DIV
C1
0.1μF
RSET
R2
R1
V+
V+ = 3.3V, RSET = 200k, and TA = 25°C, unless
otherwise noted.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC6992CDCB6-2-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:TimerBlox Voltage-Controlled Pulse Width Modulator (PWM) |
| LTC6992CDCB6-3-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:TimerBlox Voltage-Controlled Pulse Width Modulator (PWM) |
| LTC6992CDCB6-3-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:TimerBlox Voltage-Controlled Pulse Width Modulator (PWM) |
| LTC6992CDCB6-4-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:TimerBlox Voltage-Controlled Pulse Width Modulator (PWM) |
| LTC6992CDCB6-4-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:TimerBlox Voltage-Controlled Pulse Width Modulator (PWM) |
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