RT9173B
Absolute Maximum Ratings
Power Dissipation, P
D
@ T
A
= 25°C
SOP-8 -------------------------------------------------------------------------------------------------------------------- 0.625W
TO-252 ------------------------------------------------------------------------------------------------------------------- 1.471W
Package Thermal Resistance (Note 5)
SOP-8,
θ
JA
-------------------------------------------------------------------------------------------------------------- 160°C/W
SOP-8,
θ
JC
-------------------------------------------------------------------------------------------------------------- 23°C/W
TO-252,
θ
JA
------------------------------------------------------------------------------------------------------------- 68°C/W
TO-252,
θ
JC
------------------------------------------------------------------------------------------------------------- 8°C/W
Lead Temperature (Soldering, 10 sec.) --------------------------------------------------------------------------- 260°C
Junction Temperature ------------------------------------------------------------------------------------------------ 150°C
Storage Temperature Range ----------------------------------------------------------------------------------------
–65°C
to 150°C
ESD Susceptibility (Note 2)
HBM (Human Body Mode) ------------------------------------------------------------------------------------------ 2kV
MM (Machine Mode) -------------------------------------------------------------------------------------------------- 200V
(Note 1)
Input Voltage ------------------------------------------------------------------------------------------------------------ 7V
Recommended Operating Conditions
Electrical Characteristics
(Note 3)
Junction Temperature Range ---------------------------------------------------------------------------------------- –40°C to 125°C
(V
IN
= 2.5V, V
CNTL
= 3.3V, V
REFEN
= 1.25V, C
OUT
= 10
μ
F (Ceramic), T
A
= 25°C unless otherwise specified)
Parameter
Output Offset Voltage
Load Regulation
Input Voltage Range (DDR I/II)
Operating Current of VCNTL
Current In Shutdown Mode
Short Circuit Protection
Current limit
Over Temperature Protection
Symbol
V
OS
ΔV
LOAD
V
IN
V
CNTL
I
CNTL
I
SHDN
I
LIM
Test Conditions
I
OUT
= 0A, Figure 1 (Note 4)
I
L
: 0A
→
2A, Figure 1
I
L
: 0A
→
-2A
Keep V
CNTL
≥
V
IN
on operation power
on and power off sequences
No Load
V
REFEN
<
0.2V, R
L
= 180Ω, Figure 2
Figure 3,4
3.3V
≤
V
CNTL
≤
5V
3.3V
≤
V
CNTL
≤
5V
Output = High, Figure 5
Output = Low, Figure 5
Min
−20
−20
1.7
3
--
--
2.2
125
--
0.6
--
Typ
0
0
2.5/1.8
3.3/5
1
50
2.6
170
35
--
--
Max Units
20
20
--
6
2.5
90
--
--
--
--
0.2
mV
mV
V
mA
μA
A
°C
°C
Thermal Shutdown Temperature T
SD
Thermal Shutdown Hysteresis
Shutdown Function
Shutdown Threshold Trigger
ΔT
SD
V
DS9173B-09 March 2007
www.richtek.com
5
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
