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参数资料
| 型号： | EL7512CYZ |
| 厂商： | Intersil |
| 文件页数： | 2/8页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST PWM 10-MSOP |
| 标准包装： | 50 |
| PWM 型： | 控制器 |
| 输出数： | 1 |
| 频率 - 最大： | 1.2MHz |
| 占空比： | 90% |
| 电源电压： | 2 V ~ 12 V |
| 降压： | 无 |
| 升压： | 是 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 包装： | 管件 |
EL7512
Absolute Maximum Ratings (T A = 25°C)
EN, LBI, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+18V
LX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20V
V DD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12V
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Operating Temperature . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C
Operating Junction Temperature:. . . . . . . . . . . . . . . . . . . . . . . 135°C
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests
are at the specified temperature and are pulsed tests, therefore: T J = T C = T A
Electrical Specifications
V IN = 5V, V OUT = 12V, I OUT = 0mA, R T = 100k ? , T A = 25°C unless otherwise specified.
PARAMETER
IQ1
DESCRIPTION
Quiescent Current - Shut-down
VEN = 0
CONDITION
MIN
TYP
MAX
3
UNIT
μA
IQ2
VFB
Quiensent Current
Feedback Voltage
VEN = 2V
1.31
2.5
1.35
4
1.39
mA
V
IB
V IN
Feedback Input Bias Current
Input Voltage Range
2
0.10
μA
V
D MAX
Maximum Duty Cycle
84
90
%
I LIM
Current Limit - Max Average Input
1000
1250
1500
mA
Current
I SHDN
Shut-down Input Bias Current
1
μA
V LBI
V OL-LBO
I LEAK-LBO
R DS-ON
I LEAK-SWITCH
LBI Threshold Voltage
LBO Output Low
LBO Output Leakage Current
Switch On Resistance
Switch Leakage Current
ILBO = 1mA
VLBI = 250mV, VLBO = 5V
at 12V output
180
220
0.1
0.02
300
250
0.2
1
1
mV
V
μA
m ?
μA
? V OUT / ? V IN
? V OUT / ? I OUT
F OSC-MAX
Line Regulation
Load Regulation
Maximum Switching Frequency
3V < V IN < 6V, V OUT = 12V, no load
I OUT < 250mA
R T = 49.9k ?
0.5
1200
0.15
%/V
%
kHz
F OSC1
Switching Frequency
530
670
800
kHz
VHI_EN
VLO_EN
EN Input High Threshold
EN Input Low Threshold
1.6
0.5
V
V
Pin Descriptions
PIN NUMBER
1
2
3
4
5
6
7
8
9
10
PIN NAME
PGND
SGND
RT
EN
LBI
LBO
SS
FB
VDD
LX
2
PIN FUNCTION
Power ground; connected to the source of internal N-channel power MOSFET
Signal ground; ground reference for all the control circuitry; needs to have only a single connection to PGND
Timing resistor to adjust the oscillation frequency of the converter
Chip enable; connects to logic HI (>1.6V) for chip to function
Low battery input; connects to a sensing voltage, or left open if function is not used
Low battery detection output; connected to the open drain of a MOSFET; able to sink 1mA current
Soft-start; connects to a capacitor to control the start-up of the converter
Voltage feedback input; needs to connect to resistor divider to decide V O
Control circuit positive supply
Inductor drive pin; connected to the drain of internal N-channel power MOSFET
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