RT7339P
Parameter
Threshold Current of Vin Over
Voltage Protection
High VIN Entry Level
DMAG Reference Voltage
DMAG Threshold Voltage of
Open Loop
DMAG Threshold for Output
UVP
DMAG Masking Time
Symbol
I
DMAG_OCP
I
DMAG_HVSW
V
DMAG_REF
V
DMAG_OL
V
TH_UVP
t
BK
t
BK
= 1 + 4 x V
CS_PK
, V
CS
= 0.5V
Test Conditions
Min
--
--
2.4625
--
--
--
Typ
4.85
1.66
2.5
1.2
0.5
3
Max
--
--
2.5375
--
--
--
Unit
mA
mA
V
V
V
s
Constant Current Control Section (COMP)
Minimum COMP Voltage
Standby Mode Entry Level
Current Sense Section (CS)
Delay Time of Over Current
Protection
Low Vin Peak Current Limit at
Normal Operation
High Vin Peak Current Limit at
Normal Operation
Peak Current Limit in VDD
Holdup and Standby Mode
Peak Current Shutdown Voltage
Threshold
Threshold Voltage for External
OTP
Gate Driving Section (GATE)
Rising Time
Falling Time
Gate Output Clamping Voltage
Internal Pull Low Resistor
Timing Control Section
Minimum Switching Period
Minimum Switching Period in
Green Mode
Start Time During Startup and
Normal Operation
Max. Start time in Green Mode
Minimum On Time
Maximum On Time
t
S(MIN)
t
S(MIN)_GM
t
START
t
START_GM
t
ON(MIN)_LV
t
ON(MIN)_HV
t
ON(MAX)
V
COMP
> 2V
V
COMP
< 0.5V
V
COMP
> 2V
V
COMP
< 0.5V
7.38
--
--
--
--
--
--
8.5
2
31.9
7.5
1300
500
24
10.16
--
--
--
--
--
--
s
ms
s
ms
ns
ns
s
t
R
t
F
V
CLAMP
R
GATE
VDD < V
TH_ON
, before startup
C
L
= 1nF (10% to 90%)
C
L
= 1nF (10% to 90%)
--
--
--
--
165
40
13
60
265
79
--
--
ns
ns
V
k
t
D_OC
V
CL_LV
V
CL_HV
V
CL_MIN
V
CS_SD
V
OTP_TH
V
DMAG
= 2.5V,
V
CS
= 4/15*V
DMAG
I
DMAG
= 1mA
I
DMAG
= 2mA
Standby mode
490
0.52
0.43
--
--
0.593
675
0.6
0.5
90
0.85
0.67
860
0.68
0.57
--
--
0.747
ns
V
V
mV
V
V
V
COMP(MIN)
V
SB_ET
--
0.25
0.45
0.35
--
--
V
V
Copyright © 2019 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
8
DS7339P-03
August 2019
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
