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RT6318B датащи(PDF) 7 Page - Richtek Technology Corporation

номер детали RT6318B
подробное описание детали  8A, 23V Synchronous Step-Down Converter with 3.3V/5V LDO
PDF  25 Pages
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производитель  RICHTEK [Richtek Technology Corporation]
домашняя страница  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT6318B датащи(HTML) 7 Page - Richtek Technology Corporation

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RT6318B/C
7
DS6318B/C-01 December 2021
www.richtek.com
©
Copyright 2021 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Output Voltage
Output Voltage Setpoint
VOUT
RT6318B
3.267
3.3
3.333
V
RT6318C
5.049
5.1
5.151
VCC Regulator Voltage
VCC
4.95
5
5.05
V
On Resistance
High-Side Switch On Resistance
RDS(ON)_H
14
20
26
m
Low-Side Switch On Resistance
RDS(ON)_L
8
10
12
m
Discharge FET Ron
RDIS
40
50
63
Current Limit
Top FET Current Limit
ILIM_T
--
15
--
A
Bottom FET Current Limit
ILIM_B
9
10.4
11.8
A
Oscillator Frequency
Oscillator Frequency
fOSC
RT6318B
0.42
0.5
0.58
MHz
RT6318C
0.62
0.75
0.9
MHz
On-Time Timer Control
Minimum On-Time
tON_MIN
VIN = VIN(MAX)
40
50
80
ns
Minimum Off-Time
tOFF_MIN
150
200
300
ns
Ultrasonic Mode
Operation Period
tUSM
20
30
40
s
Soft-Start
Soft-Start Time
tSS
From EN high to PGOOD high
1.3
1.65
2
ms
Output Rising Time
tR
From 10% to 90% VOUT
--
0.6
--
ms
UVLO
Input UVLO Threshold
VUVLO
Wake up RT6318B
--
--
4.5
V
Wake up RT6318C
--
--
5.4
UVLO Hysteresis
VHYS
--
0.3
--
V
Output Over-Voltage Protection
Output Over Voltage Threshold
VOUT rising
115
120
125
%
Output Over Voltage Hysteresis
--
3
--
%
Output Over Voltage Delay Time
--
20
--
s
Output Under-Voltage Protection
Output Under Voltage Threshold
VFB falling
54
60
64
%
Output Under Voltage Delay Time
FB forced below UV threshold
--
20
--
s
UV Blank Time
From EN high
--
1.65
--
ms
Power Good
Power Good Threshold
VTH_PGLH
VOUT rising (Good)
88
90
92
%
Power Good Hysteresis
VTH_PGLH
--
15
--
%
Power Good Delay Time
--
10
--
s



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