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参数资料
| 型号： | L6997STR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, PDSO20 |
| 封装： | MO-153-AC, TSSOP-20 |
| 文件页数： | 23/30页 |
| 文件大小： | 546K |
| 代理商： | L6997STR |
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L6997S
5VCC
IC Supply Voltage.
6
GND
Signal ground
7
VREF
0.6V voltage reference. Connect a ceramic capacitor (max. 10nF) between this pin and
ground. This pin is capable to source or sink up to 250uA
8
VFB
PWM comparator feedback input. Short this pin to INT pin to enable the integrator function, or
to VSENSE to disable the integrator function.
9
OSC
Connect this pin to the input voltage through a voltage divider in order to provide the feed-
forward function don’t leave floating.
10
SS
Soft Start pin. A 5
A constant current charges an external capacitor. Itsvalue sets the soft-
start time don’t leave floating.
11
ILIM
An external resistor connected between this pin and GND sets the current limit threshold don’t
leave floating..
12
SHDN
Shutdown. When connected to GND the device and the drivers are OFF. It cannot be left
floating.
13
OVP
Open drain output. During the over voltage condition it is pulled up by an external resistor.
14
PGOOD
Open drain output. It is pulled down when the output voltage is not within the specified
thresholds. Otherwise is pulled up by external resistor. If not used it can be left floating.
15
PGND
Low Side driver ground.
16
LGATE
Low Side driver output.
17
VDR
Low Side driver supply.
18
PHASE
Return path of the High Side driver.
19
HGATE
High side driver output.
20
BOOT
Bootstrap capacitor pin. High Side driver is supplied through this pin.
Table 5. Electrical Characteristics
(VCC = VDR = 3.3V; Tamb = 0°C to 85°C unless otherwise specified)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
SUPPLY SECTION
Vin
Input voltage range
Vout=Vref Fsw=110Khz Iout=1A
1
35
V
VCC,
VDR
35.5
V
VCC
Turn-onvoltage
2.86
2.97
V
Turn-off voltage
2.75
2.9
V
Hysteresis
90
mV
IqVDR
Drivers Quiescent Current
VFB > VREF
7
20
A
IqVcc
Device Quiescent current
VFB > VREF
400
600
A
SHUTDOWN SECTION
SHDN
Device On
1.2
V
Device Off
0.6
V
ISHVDR
Drivers shutdown current
SHDN to GND
5
A
ISHVCC
Devices shutdown current
SHDN to GND
1
15
A
SOFT START SECTION
ISS
Soft Start current
VSS = 0.4V
4
6
A
VSS
Active Soft start and voltage
300
400
500
mV
Table 4. Pin Function (continued)
N°
Name
Description
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| L8115G-R16-R | SPECIALTY ANALOG CIRCUIT, PDSO16 |
| L8115-R20-R | SPECIALTY ANALOG CIRCUIT, PDSO20 |
| L8115G-R20-R | SPECIALTY ANALOG CIRCUIT, PDSO20 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L6998-0 | 制造商:Johanson Manufacturing 功能描述:TUNING ELEMENT |
| L6998-1 | 制造商:Johanson Manufacturing 功能描述:TUNING ELEMENT |
| L6998-5 | 制造商:Johanson Manufacturing 功能描述:TUNING ELEMENT |
| L6998-6 | 制造商:Johanson Manufacturing 功能描述:TUNING ELEMENT |
| L6999 | 制造商:HAMAMATSU 制造商全称:Hamamatsu Corporation 功能描述:The best light source is supported by the best electrode technology |
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