RT6585A/B
Electrical Characteristics
(VIN = 12V, VEN1 = VEN2 = 3.3V, VCS1 = VCS2 = 2V, VCLK disable by 200Ω to GND, No Load, TA = 25°C, unless otherwise specified)
Parameter
Input Supply
Symbol
Test Conditions
Min
Typ
Max
Unit
Rising Threshold
--
4.6
3.7
4.9
--
VIN Power On Reset
VIN_POR
V
Falling Threshold
3.2
RT6585A Both Buck Controllers
Off, VEN1 = VEN2 = GND
--
--
--
--
20
35
35
55
VIN Standby Supply Current IVIN_SBY
A
RT6585B Both Buck Controllers
Off, VEN1 = VEN2 = GND
Both Buck Controllers On,
VIN Quiescent Current
BYP1 Supply Current
IVIN_nosw
15
25
A
A
V
FBx = 2.05V, VBYP1 = 5.05V
Both Buck Controllers On,
FBx = 2.05V, VBYP1 = 5.05V
IBYP1_nosw
120
180
V
Buck Controllers Output and FB Voltage
FBx Valley Trip Voltage
BYP1 Discharge Current
VFBx
CCM Operation
1.98
10
2
2.02
--
V
IDCHG_BYP1 VBYP1 = 0.5V
45
mA
PHASEx Discharge Current
IDCHG_LX
VPHASEx = 0.5V
5
8
--
mA
Switching Frequency
V
IN = 20V, VOUT1 = 5V
320
380
--
400
475
200
480
570
275
Switching Frequency
fSWx
kHz
ns
VIN = 20V, VOUT2 = 3.33V
VFBx = 1.9V
Minimum Off-Time
Soft-Start
tOFF(MIN)
Soft-Start Time
Current Sense
CSx Source Current
tSSx
VOUT Ramp-up Time
--
0.9
--
ms
ICSx
VCSx = 1V
47
--
50
4700
1
53
--
A
ppm/C
mV
CSx Current Temperature
Coefficient
TCICSx
VZC
In Comparison with 25°C
VFBx = 2.05V, GND PHASEx
Zero-Current Threshold
--
--
Internal Regulator
VIN = 12V, No Load
4.9
4.8
5
5
5.1
5.1
VIN > 7V, ILDO5 < 100mA
VIN > 5.5V, ILDO5 < 35mA
VIN > 5V, ILDO5 < 20mA
VIN = 12V, No Load
LDO5 Output Voltage
LDO3 Output Voltage
VLDO5
V
V
4.8
5
5.1
4.5
4.75
3.3
3.3
3.3
3.3
5.1
3.267
3.217
3.267
3.217
3.333
3.383
3.333
3.383
VIN > 7V, ILDO3 < 100mA
VIN > 5.5V, ILDO3 < 35mA
VIN > 5V, ILDO3 < 20mA
VLDO3
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6
DS6585A/B-04 January 2016