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參數(shù)資料
| 型號(hào)： | RT8100 |
| 廠商： | Richtek Technology Corporation |
| 英文描述： | Synchronous buck PWM DC/DC with Dual Voltage Control Mode |
| 中文描述： | 同步降壓PWM直流/雙直流電壓控制模式 |
| 文件頁數(shù)： | 8/18頁 |
| 文件大?。?/td> | 438K |
| 代理商： | RT8100 |
RT8100
Preliminary
8
DS8100-03 August 2007
www.richtek.com
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
Oscillator
Free Running Frequency
f
OSC
170
200
230
kHz
Frequency Variation
15
--
15
%
Frequency Range
50
200
1000
kHz
Maximum Duty Cycle
70
75
80
%
Up-Ramp Setting Pin
V
RR
R
RR
= 120k
Ω
0.3
0.5
0.7
V
Reference Voltage
Feedback Voltage
V
FB
V
FB
= 0.8V
--
1.5
--
%
Error Amplifier
DC Gain
60
70
--
dB
Gain-Bandwidth Product
GBW
C
LOAD
= 5pF
6
10
--
MHz
Trans-conductance
GM
R
LOAD
= 20k
Ω
600
660
--
μ
A/V
MAX Current (Source & Sink)
I
OUT
V
OUT
= 0.5 x V
5VSB
300
360
--
μ
A
Current Sense GM Amplifier
Input Offset Voltage
V
VOSGM
R
SENSE
= 2k
Ω
5
--
5
mV
I
OMAX
I
IOMAXGM
R
SENSE
= 2k
Ω
90
--
--
μ
A
Gate Driver
Upper Drive Source
I
UGATE
BOOT
PHASE = 12V,
BOOT
V
UGATE
= 1V
V
UGATE
= 1V
0.15
0.35
--
A
Upper Drive Sink
R
UGATE
--
3.5
7
Ω
Lower Drive Source
I
LGATE
PV
CC
= 12V, PV
CC
– V
LGATE
= 1V
0.5
0.35
--
A
Lower Drive Sink
R
LGATE
V
LGATE
= 1V
--
2
4
Ω
Protection
Over Current
I
OC
--
80
--
μ
A
Note 1.
Stresses listed as the above "Absolute Maximum Ratings"
may cause permanent damage to the device. These are for
stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended
periods may remain possibility to affect device reliability.
Note 2.
Devices are ESD sensitive. Handling precaution recommended.
Note 3.
The device is not guaranteed to function outside its operating conditions.
Note 4.
θ
JA
is measured in the natural convection at T
A
= 25
°
C on a low effective thermal conductivity test board of
JEDEC 51-3 thermal measurement standard.
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