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参数资料
| 型号： | L6928Q1 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 1.65 A SWITCHING REGULATOR, 1400 kHz SWITCHING FREQ-MAX, DSO8 |
| 封装： | 3 X 3 MM, 1.08 MM HEIGHT, LEAD FREE, VFQFPN-8 |
| 文件页数： | 10/16页 |
| 文件大小： | 268K |
| 代理商： | L6928Q1 |
L6928
Pin settings
3/16
1
Pin settings
1.1
Pin connection
Figure 1.
Pin connection (top view)
1.2
Pin description
RUN
COMP
VFB
GND
1
3
2
4LX
VCC
SYNC
PGOOD
8
7
6
5
D01IN1239AMOD
Table 1. Pin description
Pin N°
Name
Description
1RUN
Shutdown input. When connected to a low level (lower than 0.4V) the device
stops working. When high (higher than 1.3V) the device is enabled.
2COMP
Error amplifier output. A compensation network has to be connected to this pin.
Usually a 220pF capacitor is enough to guarantee the loop stability.
3VFB
Error amplifier inverting input. The output voltage can be adjusted from 0.6V up
to the input voltage by connecting this pin to an external resistor divider.
4
GND
Ground.
5LX
Switch output node. This pin is internally connected to the drain of the internal
switches.
6VCC
Input voltage. The start up input voltage is 2.2V (typ) while the operating input
voltage range is from 2V to 5.5V. An internal UVLO circuit realizes a 100mV
(typ.) hysteresis.
7
SYNC
Operating mode selector input. When high (higher than 1.3V) the Low
Consumption Mode is selected. When low (lower than 0.5V) the Low Noise
Mode is selected. If connected with an appropriate external synchronization
signal (from 500KHz up to 1.4MHz) the internal synchronization circuit is
activated and the device works at the same switching frequency.
8
PGOOD
Power good comparator output. It is an open drain output. A pull-up resistor
should be connected between PGOOD and VOUT (or VCC depending on the
requirements). The pin is forced low when the output voltage is lower than 90%
of the regulated output voltage and goes high when the output voltage is greater
than 90% of the regulated output voltage. If not used the pin can be left floating.
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