RT8206A/B
Parameter
Symbol
Conditions
× R
Min
0.5
40
Typ
--
Max
2
Unit
V
I
Adjustment Range
V
= I
LIM
ILIMx LIMx
ILIMx
V
V
V
= 0.5V
50
100
200
3
60
mV
mV
mV
mV
ILIMx
ILIMx
ILIMx
GND
− PHASEx
Current-Limit Threshold
= 1V
= 2V
90
110
220
--
180
--
Zero-Current Threshold
SKIP = GND or REF, GND − PHASEx
Internal Regulator and Reference
BYP = GND, 6V < V < 25V,
IN
LDO Output Voltage
V
4.9
5
5.1
V
LDO
0 < I
< 70mA
LDO
LDO Output Current
I
BYP = GND, V = 6V to 25V
70
--
--
--
mA
mA
LDO
IN
LDO Short-Circuit Current
LDO = GND, BYP = GND
200
300
LDO 5V Switchover
Threshold to BYP
Falling Edge, Rising Edge at BYP
Regulation Point
V
4.53
--
4.66
1.5
4.79
3
V
BYP
LDO Switchover Equivalent
Resistance
R
V
LDO to BYP, 10mA
No External Load
Ω
SW
REF Output Voltage
REF Load Regulation
REF Sink Current
UVLO
1.98
--
2
10
--
2.02
--
V
REF
I
= 0 to 50uA
mV
μA
REF
REF in Regulation
10
--
Rising Edge
Falling Edge
--
4.35
4.05
4.5
--
PVCC UVLO Threshold
Power Good
PVCC
V
3.9
FBx with Respect to Internal
Reference, Falling Edge,
Hysteresis = 1%
PGOODx Threshold
−11
−7.5
−4
%
PGOODx Propagation Delay
PGOODx Leakage Current
Falling Edge
--
--
10
--
--
1
μs
High State, Forced to 5.5V
μA
PGOODx Output Low
Voltage
I
= 4mA
--
--
0.3
V
SINK
Fault Detection
OVP Trip Threshold
OVP Propagation Delay
UVP Trip Threshold
V
FBx with Respect to Internal Ref.
FBx with 50mV Overdrive
108
--
111
10
115
--
%
μs
%
FB_OVP
FBx with Respect to Internal Ref.
65
70
75
UVP Shutdown Blanking
Time
t
From ENx Enable
--
3
--
ms
SHDN_UVP
Thermal Shutdown
Thermal Shutdown
T
--
--
150
10
--
--
°C
°C
SHDN
Thermal Shutdown
Hysteresis
Logic Input
Low Level (Internal Fixed V
)
--
--
--
0.2
--
V
V
OUTx
FB1/FB2 Input Voltage
High Level (Internal Fixed V
)
V
−1
CC
OUTx
To be continued
www.richtek.com
10
DS8206A/B-03 December 2009
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
