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ST8R00W Fiches technique(PDF) 7 Page - STMicroelectronics

No de pièce ST8R00W
Description  Micropower 1A synchronous step-up DC-DC converter
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST8R00W Fiches technique(HTML) 7 Page - STMicroelectronics

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ST8R00
Electrical characteristics
7/19
5
Electrical characteristics
Table 5.
Electrical characteristics for the ST8R00 (VI = 5V, VINH = 2V, IO = 100mA,
TJ = -25°C to 125°C, CI = CO = 10µF(X7R), L = 4.7µH unless otherwise specified.)
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
VO
Output voltage
(1)
1.
For VO higher than 9V the maximum output current capability is reduced according to LX current limitation
612
V
VSTART-UP Start-up voltage
IO = 400mA, VI rising
3
3.5
V
VI
Input voltage range
4
6
V
VFB
Feedback voltage
IO = 50mA
1.195
1.22
1.245
V
VFB_OFF Feedback voltage
IO = 0, VINH = 0
0
V
IFB
Feedback current
VFB = 0, VINH = 2V
600
nA
ISUPPLY
Supply current
To be measured at VI, no load
500
µA
RDSON_N Internal N channel RDSON
ILX = 400mA
300
m
Ω
RDSON_P Internal P channel RDSON
ILX = 400mA
300
ILX(leak)
Internal leakage current
VLX = 4V, VFB = 2V, VINH = 0
0.5
µA
ILX(LIM)
LX current limitation
VLX = 4V
3
A
fOSC
Oscillator frequency
To be measured on LX pin
0.8
1.2
1.4
MHz
DTY
Max. oscillator duty cycle
To be measured on LX pin
90
%
Eff
Efficiency
IO = 100mA, VO = 9V
80
%
IO = 500mA, VO = 9V
90
IO = 1A, VO = 9V
90
VINH_H
Inhibit threshold high
2
V
VINH_L
Inhibit threshold low
VI = 4 to 6V, IO = 50mA
0.8
IINH
Inhibit pin current
VINH = VI = 5V
2
µA
TSHDN
Thermal shut down (2)
2.
Guaranteed by design
130
150
°C
THYS
Thermal shut down hysteresis
(2)
15
°C
ΔVO/ΔVI Line transient response
VI from 4 to 5.5V, IO = 500mA
(2)
-5
5
%VO
ΔVO/ΔIO Load transient response
VI = 5V, IO from 10mA to 500mA,
VO = 7V
(2)
-5
5
%VO
ΔVO/ΔVI Start-up transient
VI from 0 to 5V, IO = 500mA
-10
10
%VO
TSTART
Start-up time
VINH from 0 to 5V, IO = 100mA
500
µs


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