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MB39C502 bảng dữ liệu(PDF) 13 Page - Cypress Semiconductor

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MB39C502 bảng dữ liệu(HTML) 13 Page - Cypress Semiconductor

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Document Number: 002-08449 Rev *A
Page 13 of 46
MB39C502/503/504
7. Electrical Characteristics
(MB39C502)
VIN = 7.4V, VDD, BST and EN connect to 5V power supply, PGND, LX = 0V. TA = –30°C to +85°C, unless otherwise
noted.
Parameter
Symbol
Condition
Value
Unit
Min
Typ
Max
REFERENCE VOLTAGE
Internal reference voltage
VREF
This voltage is compared to feedback
voltage. Ta = 25°C
0.693
0.700
0.707
V
Ta =
–10°C to 85°C
0.686
-
0.714
V
FB input current
IFB
VFB = 1.0V
–0.1
-
0.1
μA
ENABLE, SLP_N
Enable condition
VEN
Enable voltage range
0.65
-
5.5
V
VDSB
Disable voltage range
0
-
0.25
V
EN input current
IEN
VEN = 5.0V
-
0
0.1
μA
SLP_N enable condition
VSLPDSB
LPM disable voltage range
0.65
-
5.5
V
VSLPEN
LPM enable voltage range
0
-
0.35
V
SLP_N input current
ISLP_N
VSLP_N = 5.0V
-
0
0.1
μA
SUPPLY CURRENT
VDD supply current
IVDDPWM
VDD, VCC input current at PWM
operating. TA = 25°C
-
380
760
μA
IVDDPFM
VDD, VCC input current at idle state in
PFM operation. Static 0A inductor
current. TA = 25°C
-
180
360
μA
IVDDLPM
VDD, VCC input current at idle state in
LPM operation. Static 0A inductor
current. TA = 25°C
-
30
60
μA
VDD shutdown current
IVDDSDN
VDD, VCC input current at VEN = 0V
-
0.1
1.0
μA
VIN supply current
IVIN
VVIN = 25V
-
10
15
μA
VIN shutdown current
IVINSDN
VIN input current at VEN = 0V
-
0.1
1.0
μA
UNDER VOLTAGE LOCKOUT
VCC UVLO threshold
VUVLO
UVLO release voltage
3.99
4.14
4.29
V
VHYS
Hysteresis
0.005
0.070
0.200
V
SOFT START, DISCHARGE
Period of power on reset
tPOR
From enable ON to the switching
initiating.
200
-
1000
μs
Ramp up time
tSS
From the switching initiating after
enable ON to the output voltage
reaches 95%.
598
665
732
μs
Discharge resistance
RDISCHG
VOUT = 0.2V, discharge enable.
50
100
200
Ω
Discharge ends voltage
VDISCHG
VCSN voltage.
0.07
0.10
0.13
V



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