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參數(shù)資料
| 型號： | L6725 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Low cost adjustable step-down controller |
| 中文描述： | 低成本可調(diào)降壓控制器 |
| 文件頁數(shù)： | 6/27頁 |
| 文件大小： | 489K |
| 代理商： | L6725 |
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Pin connections and functions
L6725
6/27
3
Pin connections and functions
Figure 2.
Pins connection (Top view)
Table 3.
Pin functions
Pin n.
Name
Function
15
SGND
All the internal references are referred to this pin.
16
FB
This pin is connected to the error amplifier inverting input. Connect it to V
OUT
through
the compensation network. This pin is also used to sense the output voltage in order
to manage the over voltage protection.
1
COMP
This pin is connected to the error amplifier output and is used to compensate the
voltage control feedback loop.
2
SS/INH
The soft-start time is programmed connecting an external capacitor from this pin to
GND. The internal current generator forces a current of 10
μ
A through the capacitor.
When the voltage at this pin is lower than 0.5V the device is disabled.
3
EAREF
By setting the voltage at this pin is possible to select the internal/external reference
and the switching frequency:
V
EAREF
0-80% of V
CCDR
-> External Reference/F
SW
= 250KHz
V
EAREF
= 80% - 95% of V
CCDR
-> V
REF
= 0.6V/F
SW
= 500KHz
V
EAREF
= 95% - 100% of V
CCDR
->V
REF
= 0.6V/F
SW
= 250KHz
An internal clamp limits the maximum V
EAREF
at 2.5V (typ.). The device captures the
analog value present at this pin at the start-up when V
CC
meets the UVLO threshold.
1
2
3
4
5
6
11
12
SO16N
13
14
15
16
EAREF
OCL
OCH
PHASE
HGATE
BOOT
SS/INH
COMP
FB
N.C.
LGATE
PGND
N.C.
7
10
SGND
VCC
VCCDR
8
9
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