參數(shù)資料
型號： RT9201
廠商： Richtek Technology Corporation
元件分類： DC/DC變換器
英文描述： High Efficiency PWM Step-Down DC-DC Converter
中文描述： 高效PWM降壓型DC - DC轉(zhuǎn)換器
文件頁數(shù)： 4/13頁
文件大小： 206K
代理商： RT9201
RT9201
4
DS9201-12 August 2007
www.richtek.com
Electrical Characteristics
(V
IN
= 3.6V, V
OUT
= 2.5V, EN = V
IN
, L
X
= 10
μ
H, C
IN
= 10
μ
F, C
OUT
= 22
μ
F, T
A
= 25
°
C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
Input Voltage Range
V
IN
2.5
0.85
--
5.5
V
IN
V
Adjustable Output Range
V
OUT
(Note 4)
--
V
Reference Voltage
V
REF
I
L
= 300mA
--
0.8
--
V
Cross Regulation
V
CROSS
V
IN
= 2.5V to 5.5V,
I
L
= 600mA to 0mA
3
--
+3
%
FB Input Current
I
FB
V
FB
= V
IN
50
--
50
nA
PMOSFET R
ON
P
RDS(ON)
I
LX
= 200mA
0.2
0.37
0.43
NMOSFET R
ON
N
RDS(ON)
I
LX
= 200mA
R
L
= 0.1
, V
FB
= V
REF
0.15
0.2
0.3
0.35
P-Channel Current Limit
I
P(LM)
0.8
1.17
1.6
A
Quiescent Current
I
Q
I
LX
= 0mA, V
FB
= V
REF
+ 0.15
40
85
140
μ
A
Shutdown Current
I
Q(SD)
EN = 0V, V
IN
= 5.5V
0.01
2
7
μ
A
Oscillator Frequency
f
OSC
I
OUT
= 100mA
600
800
1k
kHz
EN Input High Threshold
V
IH
V
IN
= 2.5V to 5.5V
1.5
--
--
V
EN Input Low Threshold
V
IL
V
IN
= 2.5V to 5.5V
--
--
0.4
V
°
C
%
Thermal Shutdown Temperature
T
SD
125
150
--
Maximum Duty Cycle
V
IN
= V
OUT
No Load
100
--
--
Minimum On Time
0.1
0.2
0.3
μ
s
LX Leakage Current
EN
= 0V,V
IN
= 5.5V, V
LX
= 0V or
V
LX
= 5.5V
20
1
20
μ
A
Recommended Operating Conditions
(Note 3)
l
Supply Input Voltage ------------------------------------------------------------------------------------------------2.5V to 5.5V
l
Junction Temperature Range --------------------------------------------------------------------------------------
40
°
C to 125
°
C
Absolute Maximum Ratings
(Note 1)
l
Input Voltage ----------------------------------------------------------------------------------------------------------6V
l
Power Dissipation, P
D
@ T
A
= 25
°
C
VDFN
10L 3x3 -------------------------------------------------------------------------------------------------------2.1W
l
Junction Temperature -----------------------------------------------------------------------------------------------150
°
C
l
Storage Temperature Range ---------------------------------------------------------------------------------------
65
°
C to 150
°
C
l
Package Thermal Resistance
VDFN
10L 3x3,
θ
JA
--------------------------------------------------------------------------------------------------47
°
C/W
l
Lead Temperature (Soldering, 10 sec.)--------------------------------------------------------------------------260
°
C
l
Storage Temperature Range ---------------------------------------------------------------------------------------
65
°
C to 150
°
C
l
ESD Susceptibility (Note 2)
HBM (Human Body Mod) -----------------------------------------------------------------------------------------2kV
MM (Machine Mode) -----------------------------------------------------------------------------------------------200V
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