RT8206A/B
Electrical Characteristics
(VIN = 12V, EN1 = EN2 = VCC, VBYP = 5V, PVCC = 5V, VENLDO = 5V, No Load on LDO, VOUT1, VOUT2 and REF, TA = 25°C,
unless otherwise specified)
Parameter
Input Supply
Symbol
Conditions
Min
Typ
Max
Unit
V
= 6V to 25V, Both SMPS Off,
IN
VIN Standby Supply Current I
--
--
180
20
250
40
μA
μA
VIN_SBY
ENLDO = 5V
V = 6V to 25V,
IN
ENx = ENLDO = GND
Both SMPSs On,
VIN Shutdown Supply
I
VIN_SHDH
Current
Quiescent Power
Consumption
FB1 = SKIP = GND, FB2 = V
,
CC
--
5
7
mW
V
V
= BYP = 5.3V,
OUT1
OUT2
= 3.5V
(Note 5)
SMPS Output and FB Voltage
V
= 6V to 25V, FB1= GND,
IN
VOUT1 Output Voltage in
Fixed Mode
V
4.975
3.285
5.05
3.33
5.125
3.375
V
V
OUT1
OUT2
SKIP = 5V
= 6V to 25V, FB2 = V ,
CC
V
VOUT2 Output Voltage in
Fixed Mode
IN
V
SKIP = 5V
FBx in Output Adjustable
Mode
FBx
V
= 6V to 25V
1.975
1.92
2
2
2
--
2.025
2.08
5.5
V
V
V
IN
SECFB Voltage
SECFB
V
IN
= 6V to 25V (RT8206A)
Output Voltage Adjust
Range
SMPS1, SMPS2
FBx Adjustable-mode
Threshold Voltage
Fixed or Adj-Mode comparator
threshold
0.2
0.4
0.55
V
--
--
--
--
−0.1
−1.7
--
--
--
--
%
%
Either SMPS, SKIP = V , 0 to 5A
CC
DC Load Regulation
V
Either SMPS, SKIP = REF, 0 to 5A
Either SMPS, SKIP = GND, 0 to 5A
LOAD
−1.5
%
Line Regulation
V
Either SMPS, V = 6V to 25V
0.005
%/V
LINE
IN
On Time
SMPS1 = 5.05V (200kHz) 1895
SMPS2 = 3.33V (250kHz) 999
SMPS1 = 5.05V (300kHz) 1227
2105
1110
1403
740
1052
555
300
33
2315
1221
1579
833
1209
635
400
--
TON =
V
CC
TON =
REF
On-Time Pulse Width
t
ns
UGATEx
SMPS2 = 3.33V (375kHz)
SMPS1 = 5.05V (400kHz)
SMPS2 = 3.33V (500kHz)
647
895
475
200
25
TON =
GND
Minimum Off-Time
Ultrasonic Mode Frequency
Soft Start
t
t
ns
LGATEx
SSx
SKIP = REF
kHz
Soft-Start Time
Zero to full limit from ENx Enable
--
2
--
ms
Current Sense
Current Limit Threshold
(Default)
Current Limit Current
Source
I
= V , GND − PHASEx
90
100
5
110
mV
LIMx
CC
I
4.75
5.25
μA
LIMX
To be continued
DS8206A/B-03 December 2009
www.richtek.com
9
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
