RT6252A/B
SOT-563 (FC)
(VIN = 12V, TA = 25C, unless otherwise specified)
Parameter
Supply Voltage
Symbol
Test Conditions
Min
Typ
Max
Unit
VIN Supply Input Operating
Voltage
VIN
4.5
3.9
--
--
17
4.5
--
V
V
Under-Voltage Lockout
Threshold
VUVLO
4.2
420
Under-Voltage Lockout
Threshold Hysteresis
VUVLO
mV
Shutdown Current
Quiescent Current
Soft-Start
ISHDN
IQ
VEN = 0V
--
--
3
10
--
µA
µA
VEN = 2V, VFB = 0.85V
295
Soft-Start Time
Enable Voltage
tSS
--
0.95
--
ms
VEN_H
VEN_L
EN high-level input voltage
EN low-level input voltage
1.24
1.09
1.31
1.16
1.38
1.23
Enable Voltage Threshold
V
EN Pin Pull-Down
Resistance
REN_DN
EN pin resistance to GND, V = 12V 225
450
900
k
EN
Feedback Voltage and Discharge Resistance
Feedback Threshold Voltage VFB
V
= 1.05V
799
807
0
815
0.1
mV
OUT
Feedback Input Current
Internal MOSFET
IFB
V
= 0.85V, T = 25°C
0.1
A
FB
A
High-Side On-Resistance
Low-Side On-Resistance
Current Limit
RDS(ON)_H
RDS(ON)_L
VBOOT – VSW = 4.8V
--
--
140
84
--
--
mΩ
High-Side Switch Current
Limit
ILIM_H
ILIM_L
--
5
--
A
Low-Side Switch Valley
Current Limit
2.5
3.35
4.2
Switching Frequency
Switching Frequency
On-Time Timer Control
On-Time
fSW
VOUT = 1.05V, PWM mode
--
580
--
kHz
tON
VOUT = 1.05V
VFB = 0.5V
--
--
171
190
--
ns
ns
Minimum Off-Time
tOFF_MIN
250
Output Under-Voltage Protections
UVP Trip Threshold
VUVP
Hiccup detect
--
--
--
65
1.8
15
--
--
--
%
Hiccup Power On-Time
Hiccup Power Off-Time
tHICCUP_ON
tHICCUP_OFF
ms
Copyright © 2019 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
10
DS6252A/B-00 July 2019
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
