參數(shù)資料
型號(hào)： PM6675ASTR
廠商： STMICROELECTRONICS
元件分類(lèi)： 穩(wěn)壓器
英文描述： 3 A SWITCHING CONTROLLER, QCC24
封裝： 4 X 4 MM, LEAD FREE, VFQFPN-24
文件頁(yè)數(shù)： 45/48頁(yè)
文件大?。?/td> 2481K
代理商： PM6675ASTR
Pin settings
PM6675AS
6/48
2.2
Pin description
Table 2.
Pin functions
N°
Pin
Function
1
LGND
LDO power ground. Connect to negative terminal of VTT output capacitor.
2LFB
LDO remote sensing. Connect as close as possible to the load via a low
noise PCB trace.
3NOSKIP
Pulse-skip/no-audible pulse-skip modes selector.
4LPG
LDO section power-good signal (open drain output). High when LDO output
voltage is within ±10 % of nominal value.
5SGND
Ground Reference for analog circuitry, control logic and VTTREF buffer.
Connect together with the thermal pad and VTTGND to a low impedance
ground plane. See the Application Note for details.
6AVCC
+5 V supply for internal logic. Connect to +5 V rail through a simple RC
filtering network.
7VREF
High accuracy output voltage reference (1.237 V) for multilevel pins setting.
It can deliver up to 50 uA. Connect a 100 nF capacitor between VREF and
SGND in order to enhance noise rejection.
8VOSC
Frequency Selection. Connect to the central tap of a resistor divider to set
the desired switching frequency. The pin cannot be left floating. See
9
VSNS
Switching section output remote sensing and discharge path during output
soft-end. Connect as close as possible to the load via a low noise PCB
trace.
10
VSEL
Fixed output selector and feedback input for the switching controller.
If VSEL pin voltage is higher than 4 V, the fixed 1.5 V output is selected. If
VSEL pin voltage is lower than 4 V, it is used as negative input of the error
11
COMP
DC voltage error compensation input pin for the switching section.
Refer to Mode of Operation Selection section for more details.
12
LILIM
Current limit selector for the LDO. Connect to SGND for ±1 A current limit or
to +5 V for ±2 A current limit.
13
SWEN
Switching Controller Enable. When tied to ground, the switching output is
turned off and a soft-end is performed.
14
LEN
Linear Regulator Enable. When tied to ground, the LDO output is turned off
and a soft-end is performed.
15
SPG
Switching Section power-good signal (open drain output). High when the
switching regulator output voltage is within ±10 % of nominal value.
16
PGND
Power ground for the switching section.
17
LGATE
Low-side gate driver output.
18
VCC
+5 V low-side gate driver supply. Bypass with a 100 nF capacitor to PGND.
相關(guān)PDF資料
PDF描述
PM6675AS 3 A SWITCHING CONTROLLER, QCC24
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