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参数资料
| 型号： | MC33998 |
| 厂商： | 飞思卡尔半导体(中国)有限公司 |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | Switching Power Supply with Linear Regulators(带线性稳压器的开关电源) |
| 中文描述： | 开关电源与线性稳压器（带线性稳压器的开关电源） |
| 文件页数： | 8/20页 |
| 文件大小： | 437K |
| 代理商： | MC33998 |
33998
8
Go to: www.freescale.com
Characteristic
Symbol
Min
Typ
Max
Unit
SENSOR SUPPLIES V
REF1
, V
REF2
V
REF
On-Resistance, T
A
= -40°C
I
VREF
= 200 mA, I
VDDH
= 200 mA, V
PWR
= KA_V
PWR
= 14 V, EN = 5.0 V
R
DS(on)
–
–
280
m
V
REF
On-Resistance, T
A
= +25°C
I
VREF
= 200 mA, I
VDDH
= 200 mA, V
PWR
= KA_V
PWR
= 14 V, EN = 5.0 V
R
DS(on)
–
–
350
m
V
REF
On-Resistance, T
A
= +125°C
I
VREF
= 200 mA, I
VDDH
= 200 mA, V
PWR
= KA_V
PWR
= 14 V, EN = 5.0 V
R
DS(on)
–
–
455
m
V
REF
Short-to-Battery Detect Current
V
PWR
= KA_V
PWR
= 14 V, EN = 5.0 V, SNSEN = 5.0 V
I
SC_Bat
500
–
900
mA
V
REF
Short-to-Ground Detect Current
V
PWR
= KA_V
PWR
= 14 V, EN = 5.0 V, SNSEN = 5.0 V
I
SC_Gnd
500
–
900
mA
Maximum Output Capacitance (Total) (Note 13)
C
VREF
33
–
39
nF
SUPERVISORY CIRCUITS
PWROK Undervoltage Threshold on V
DDL
, FBL Ramps Down
V
PWR
= KA_V
PWR
= 14 V, I
VDDH
= 200 mA
V
FBL(thL)
2.1
2.4
2.5
V
PWROK Undervoltage Threshold on V
DDH
V
PWR
= KA_V
PWR
= 14 V, I
VDDH
= 200 mA
V
DDH(thL)
4.5
–
4.8
V
V
DDH
Overvoltage Threshold
V
PWR
= KA_V
PWR
= 10 V, I
VDDH
= 200 mA
V
DDH(thH)
5.12
–
5.7
V
PWROK Open Drain On-Resistance
V
PWR
= KA_V
PWR
= 14 V, EN = 5 V, I
PwrOK
= 5.0 mA
R
DS(on)
–
–
200
VKAMOK Threshold,
V
PWR
= KA_V
PWR
= 14 V, I
VDDH
= 200 mA
V
KAM(thL)
2.1
2.4
2.5
V
VKAMOK Threshold on V
PWR
, V
PWR
Ramps Up
KA_V
PWR
= 14 V, I
VDDH
= 200 mA
V
PWRok(th)
4.0
–
5.0
V
VKAMOK Open Drain On-Resistance
V
PWR
= KA_V
PWR
= 14 V, EN = 0 V, I
VKAMOK
= 10 mA
R
DS(on)
50
–
200
Enable Input Voltage Threshold (Pin EN)
V
IH
1.0
–
2.0
V
Enable Pull-Down Current (Pin EN), EN = 1.0 V V
DDH
to V
IL(min)
I
PD
500
–
1200
nA
Sensor Enable Input Voltage Threshold (Pin SNSEN)
V
IH
1.0
–
2.0
V
Sensor Enable Pull-Down Current (Pin SNSEN)
SNSEN = 1.0 V V
DDH
to V
IL(min)
I
PD
500
–
1200
nA
Notes
13.
Recommended value.
STATIC ELECTRICAL CHARACTERISTICS (continued)
Characteristics noted under conditions 9.0 V
≤
V
PWR
≤
16 V, -40
°
C
≤
T
J
= T
A
≤
125
°
C, using the typical application circuit (see
Figure 8
) unless otherwise noted. Typical values noted reflect the approximate parameter mean at T
A
= 25
°
C under nominal
conditions unless otherwise noted.
F
Freescale Semiconductor, Inc.
For More Information On This Product,
n
.
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