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參數(shù)資料
| 型號(hào)： | MC34701EK |
| 廠(chǎng)商： | 飛思卡爾半導(dǎo)體(中國(guó))有限公司 |
| 英文描述： | 1.5 A Switch-Mode Power Supply with Linear Regulator |
| 中文描述： | 1.5開(kāi)關(guān)模式電源，線(xiàn)性穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 11/38頁(yè) |
| 文件大?。?/td> | 739K |
| 代理商： | MC34701EK |
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Analog Integrated Circuit Device Data
Freescale Semiconductor
11
34701
DYNAMIC ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
Table 4.
Characteristics noted under conditions -40°C
≤
T
A
≤
85
°
C unless otherwise noted. Input voltages VIN1 = VIN2
= 3.3 V using
the typical application circuit (see
Figures 33
) unless otherwise noted.
DYNAMIC ELECTRICAL CHARACTERISTICS
Characteristic
Symbol
Min
Typ
Max
Unit
Buck Converter
Duty Cycle Range (Normal Operation)
(17)
t
D
0
–
95
%
Switching Node SW Rise Time
(17)
VIN = 5.0 V, ILOAD = 1.0 A
t
RISE
–
7.0
–
ns
Switching Node SW Fall Time
(17)
VIN = 5.0 V, ILOAD = 1.0 A
t
FALL
–
17
–
ns
Maximum Deadtime
(17)
t
D
–
35
–
ns
Buck Control Loop Propagation Delay
(17)
VINV
< 0.8 V to VSW > 90% of High Level or VINV > 0.8 V to VSW < 10%
of Low Level
t
PD
–
50
–
ns
Soft Start Duration (Power Sequencing Disabled, EN1 = 1, EN2 = 1)
(17)
t
SS
200
350
800
μ
s
Fault Condition Time-Out
(17)
t
FAULT
7.0
10
15
ms
Retry Timer Cycle
(17)
t
RET
70
100
150
ms
Oscillator
Oscillator Center Frequency
(19)
RF = 11.3 k
f
OSC
270
300
330
kHz
Oscillator Frequency Range
f
OSC
200
–
400
kHz
Oscillator Frequency Adjusting Resistor Range
R
FREQ
7.0
–
22
k
Oscillator Frequency Adjustment
(18)
,
(19)
RF = 7.0 k
f
OSC
400
–
–
kHz
Oscillator Frequency Adjustment
(18)
,
(19)
RF = 22 k
f
OSC
–
–
200
kHz
Oscillator Default Frequency (Switching Frequency), FREQ Terminal Open
f
OSC
–
300
–
kHz
Oscillator Output Signal Duty Cycle (Square Wave, 180° Out-of-Phase with
the Internal Suitable Oscillator)
D
OSC
40
50
60
%
Synchronization Pulse Minimum Duration
(17)
t
SYNC
1.0
–
–
μ
s
Notes
17.
18.
19.
Design information only. This parameter is not production tested.
see Figure 4 for more details
RF is RFREQ
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