RT6575C/D
Electrical Characteristics
(VIN = 12V, VEN1 = VEN2 = 3.3V, VCS1 = VCS2 = 2V, 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
VINPOR
V
Falling Threshold
3.2
RT6575C Both Buck Controllers
Off, VEN1 = VEN2 = GND
--
--
--
--
60
80
80
100
25
VIN Standby Supply Current IVIN_SBY
A
RT6575D Both Buck Controllers
Off, VEN1 = VEN2 = GND
Both Buck Controllers On,
VFBx = 2.05V, VBYP1 = 5.05V
VIN Quiescent Current
BYP1 Supply Current
IVIN_nosw
15
A
A
Both Buck Controllers On,
IBYP1_nosw
420
500
VFBx = 2.05V, VBYP1 = 5.05V
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
240
280
--
300
355
200
360
430
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
VOUTx Ramp-up Time
--
0.9
--
ms
ICSx
VCSx = 1V, VFBx = 1.9V
9
--
--
10
4700
1
11
--
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
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
VIN = 12V, No Load
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
Copyright 2016 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS6575C/D-02 February 2016
www.richtek.com
7
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