RT5090E
Parameter
BUCK1
Supply Current
Supply Current (Quiescent)
Reference and Soft-Start
Output Feedback Voltage
Soft-Star Time
Current Limit
Current Limit Setting Current
I
CS
Current Limit Temperature
Coefficient
Switching Frequency and Minimum Off Timer
Switching Frequency
Minimum Off-Time
Minimum On-Time
Protections
OVP Trip Threshold
OVP Propagation Delay
UVP Trip Threshold
UVP Propagation Delay
Zero Current Detection
Zero Current Crossing
Threshold
Discharge Resistor
Discharge Resistance
Driver On-Resistor
UGATE1 Driver Source
UGATE1 Driver Sink
LGATE1 Driver Source
LGATE1 Driver Sink
R
UGATE1_sr
R
UGATE1_sk
R
LGATE1_sr
R
LGATE1_sk
t
D1_LU
Dead Time
t
D1_UL
Internal Boost Diode
Resistance
R
BOOT
V
BOOT1
- V
PHASE1
= 5V
V
BOOT1
- V
PHASE1
= 5V
LGATE1, high state
LGATE1, low state
From LGATE1 falling to
UGATE1 rising
From UGATE1 falling to
LGATE1 rising
VCC to BOOT1,
I
BOOT1
= 10mA
--
--
--
--
--
--
--
3
1
3
0.7
30
20
40
6
2
6
1.5
--
--
80
ns
ns
R
DISCHG
Controlled by I
2
C 0x09[1:0] =
01h
--
100
--
V
PHASE_ZC
4
--
4
mV
V
OVP
t
OVPDLY
V
UVP
t
UVPDLY
--
--
--
--
120
5
60
5
--
--
--
--
%
s
%
s
f
SW
t
OFF
t
ON
Controlled by I
2
C
0x03[2:1] = 01h
45
--
50
4700
55
--
A
ppm/C
V
FB
t
SS
VOUT soft-start time
1.188
--
1.2
1
1.212
--
V
ms
VIN1>VIN1_UVLO, no
switching
--
250
--
A
Symbol
Test Conditions
Min
Typ
Max
Unit
--
150
--
450
400
350
--
500
--
kHz
ns
ns
Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS5090E-00 August 2018
www.richtek.com
7
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