参数资料
| 型号： | ISL78205AVEZ |
| 厂商： | Intersil |
| 文件页数： | 7/19页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 20HTSSOP |
| 标准包装： | 740 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 可调至 0.8V |
| 输入电压： | 3 V ~ 40 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 200kHz ~ 2.2MHz |
| 电流 - 输出： | 2.5A |
| 同步整流器： | 两者兼有 |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽）裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 20-HTSSOP |
ISL78205
Electrical Specifications Refer to “Block Diagram” on page 4 and Typical Application Schematics on page 5. Operating Conditions
Unless Otherwise Noted: VIN = 12V, or VCC = 4.5V, TA = -40°C to +105°C. Typical are at TA = +25°C. Boldface limits apply over the operating temperature
range, -40°C to +105°C. (Continued)
MIN
MAX
PARAMETER
SYMBOL
TEST CONDITIONS
(Note 7)
TYP
(Note 7) UNITS
OSCILLATOR
PWM Frequency
MIN ON Time
MIN OFF Time
f OSC
t MIN_ON
t MIN_OFF
R T = 665k ?
R T = 51.1k ?
FS Pin connected to VCC or Floating or GND
160
1950
450
200
2200
500
130
210
240
2450
550
225
325
kHz
kHz
kHz
ns
ns
SYNCHRONIZATION
Input High Threshold
Input Low Threshold
Input Minimum Pulse Width
Input Impedance
Input Minimum Frequency Divided by Free Running
V IH
V IL
2
0.5
25
100
1.1
V
V
ns
k ?
Frequency
Input Maximum Frequency Divided by Free Running
Frequency
1.6
Output Pulse Width
C SYNC = 100pF
100
ns
Output Pulse High
Output Pulse Low
V OH
V OL
R LOAD = 1k ?
V CC -
0.25
GND
V
V
REFERENCE VOLTAGE
Reference Voltage
System Accuracy
FB Pin Source Current
V REF
-1.0
0.8
5
1.0
V
%
nA
SOFT-START
Soft-Start Current
I SS
3
5
7
μA
ERROR AMPLIFIER
Unity Gain-Bandwidth
DC Gain
Maximum Output Voltage
Minimum Output Voltage
C LOAD = 50pF
C LOAD = 50pF
10
88
3.6
0.5
MHz
dB
V
V
Slew Rate
SR
C LOAD = 50pF
5
V/μs
INTERNAL HIGH-SIDE MOSFET
Upper MOSFET r DS(ON)
r DS(ON)_UP
Note 6
90
150
m ?
LOW-SIDE MOSFET GATE DRIVER
LGate Source Resistance
LGATE Sink Resistance
100mA Source Current
100mA Sink Current
3.5
3.3
?
?
POWER GOOD MONITOR
Overvoltage Rising Trip Point
Overvoltage Rising Hysteresis
V FB /V REF
V FB /V OVTRIP
Percentage of Reference Point
Percentage Below OV Trip Point
104
110
3
116
%
%
7
FN7926.3
February 19, 2014
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