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参数资料
| 型号： | ISL8540IVEZ |
| 厂商： | Intersil |
| 文件页数： | 3/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 2A 20HTSSOP |
| 标准包装： | 74 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.21 V ~ 35 V |
| 输入电压： | 9 V ~ 40 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 100kHz ~ 600kHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°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-TSSOP-EP |
| 产品目录页面： | 1248 (CN2011-ZH PDF) |
ISL8540
Electrical Specifications
Unless otherwise specified the specifications listed in the table are tested at T A = +25°C and guard band for the
full Temperature Range, V IN = 24V, V OUT = 5.0V, I OUT = 0A. Typical values are at T A = +25°C. Parameters
with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits
established by characterization and are not production tested. (Continued)
PARAMETER
Oscillation Frequency
SYMBOL
f OSC
TEST CONDITIONS
V IN = 9V to 40V, R T = 100k Ω , C T = 1200pF
MIN
TYP
60
MAX
UNITS
kHz
V IN = 9V to 40V, R T = 27.4k Ω , C T = 220pF
725
kHz
Max Ramp Amplitude
Modulator Gain
Min OFF Time
Δ V OSC
V VIN / Δ V OSC
V IN = 9V
1
9
150
300
V P
-
ns
REFERENCE AND SOFT-START
Internal Reference Voltage
V REF
1.21
V
Soft-Start Current
Soft-Start Threshold
I SS
V SOFT
8
1.0
10
12
μA
V
ERROR AMPLIFIER
Transconductance
Gain-Bandwidth Product
Slew Rate
COMP Pin Drive
g m
GBW
SR
I COMP
3.9
5.7
15
6
±200
7.2
ms
MHz
V/μs
μA
Internal Feedback Voltage
Internal Feedback Bias Current
V FB
I FB
T A = -40°C to +85°C, V IN = 9.0V to 40V
T A = -40°C to +85°C, V FB = 1.20V
1.194
1.210
±50
1.222
±100
V
nA
OVERCURRENT PROTECTION
Dynamic Current Limit ON Time
t OCON
16
Clock
pulses
Dynamic Current Limit OFF Time
t OCOFF
4
SS cycle
Switch Current Limit
I LIMIT
T A = +25°C
3.2
4.0
4.8
A
POWER-GOOD (OPEN DRAIN)
Power-Good Lower Threshold
PGOOD Leakage Current
PGOOD Voltage Low
V PG-
V PG+
I PGLKG
Fraction of the V OUT set point; ~3μs noise filter
Fraction of the V OUT set point; ~3μs noise filter
V PULLUP = 5.5V
I PGOOD = 4mA
85
111
89
115
1
0.5
%
%
μA
V
MOSFET
Switch ON-Resistance
r DS(ON)
I OUT = 2A, V BOOT = V IN + 5.0V, Tested at wafer
0.19
0.355
Ω
level
EN
Input HIGH Level (Asserted)
Input LOW Level (Unasserted)
VINHIGH
VINLOW
2.6
1.2
V
V
Input Current HIGH
Input Current LOW
I ENHIGH
I ENLOW
V IN = 24V
V IN = 24V
25
25
μA
μA
SYNC
Input HIGH Level (Asserted)
Input LOW Level (Unasserted)
Input Current HIGH
Input Current LOW
VINHIGH
VINLOW
I SYNCHIGH
I SYNCLOW
2.6
1.2
0.2
0.2
V
V
μA
μA
3
FN6495.5
September 9, 2008
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