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MC34727AFCR2 Arkusz danych(PDF) 6 Page - Freescale Semiconductor, Inc

Numer części MC34727AFCR2
Szczegółowy opis  600mA High Efficiency Low Quiescent Current Synchronous Buck Regulator With Z-mode
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Producent  FREESCALE [Freescale Semiconductor, Inc]
Strona internetowa  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC34727AFCR2 Arkusz danych(HTML) 6 Page - Freescale Semiconductor, Inc

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Analog Integrated Circuit Device Data
6
Freescale Semiconductor
MC34727
ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
Table 4. Static Electrical Characteristics
Characteristics noted under conditions; 2.7V
≤ VIN ≤ 5.5V, 0.8V ≤ VOUT ≤ 3.3V, -25oC ≤ TA ≤ 85oC, CIN = COUT = 4.7µF,
L1 = 4.7
µH (See Figure 1), unless otherwise noted. The typical specifications are measured at the following conditions;
TA = +25oC, VIN = 3.6V, fSW = 2.0MHz with the typical operating circuit (See Figure 1), unless otherwise noted.
Characteristic
Symbol
Min
Typ
Max
Unit
Supply Voltage
VIN
2.7
-
5.5
V
Output Voltage (Factory preset)
VOUT
0.8
-
3.3
V
Output Current
IOUT
600
-
-
mA
Total Supply Current(5)
Regulator disabled
IDIS
-
0.1
1.0
µA
Quiescent Current (Switching)
Sleepy Z-mode and ILOAD = 0mA
IQ
-
65
85
µA
Current Limit
Current rising at high side
IPK
-
900
-
mA
Output Voltage Accuracy (% of output voltage)
Over load and temperature
∆VOUT
-3%
-
3%
VOUT
UVLO Threshold(6)
VIN: 2.7 -5.5V
VIN rising
VIN falling
VUVLO
-
2.5
-
-
2.7
-
V
Enable Voltage
Regulator operating
Regulator shutdown
VEN
1.6
-
-
-
-
0.4
V
High Side Power MOSFET On Resistance
VIN = 3.6V, VOUT = 1.8V, TA = 40°C, ILOAD = 150mA
RDS(ON)H
-
250
-
m
Low Side Power MOSFET On Resistance
VIN = 3.6V, VOUT = 1.8V, TA = 40°C, ILOAD = 150mA
RDS(ON)L
-
350
-
m
Load Regulation
1.0mA < ILOAD < 600mA and VOUT = 1.8V
∆VOUT/∆IOUT
-
0.5
-
%
Line Regulation
VIN = 2.7V to 5.5V
∆VOUT/∆VIN
-
0.5
-
%
Start-up Overshoot (% of output voltage)
ILOAD = 0mA, VOUT = 1.8V and COUT = 4.7µF
VSTO
-
3%
-
VOUT
Thermal Shutdown Threshold (Junction Temperature)
TSTDN
-
140
-
°C
Thermal Shutdown Hysteresis (Junction Temperature)
THYSTR
-
10
-
°C
Notes
5.
Maximum IDIS measured at VIN = 3.6V and TA = 25°C.
6.
For a product with a VOUT of 3.3V and a VIN minimum less than 3.6V, the VOUT value will track (drop below 3.3V) VIN down to a value
of 2.5V, where the UVLO shutdown mechanism will activate.


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