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参数资料
| 型号： | LT1937ES5#TRM |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 0.32 A SWITCHING REGULATOR, 1600 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封装： | PLASTIC, TSOT-23, 5 PIN |
| 文件页数： | 6/12页 |
| 文件大小： | 358K |
| 代理商： | LT1937ES5#TRM |
3
LT1937
1937f
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Current Limit vs Duty Cycle
Quiescent Current
SHDN Pin Bias Current
Switching Frequency
Feedback Bias Current
UU
U
PI FU CTIO S
SW (Pin 1): Switch Pin. Connect inductor/diode here.
Minimize trace area at this pin to reduce EMI.
GND (Pin 2): Ground Pin. Connect directly to local ground
plane.
FB (Pin 3): Feedback Pin. Reference voltage is 95mV.
Connect cathode of lowest LED and resistor here. Calcu-
late resistor value according to the formula:
RFB = 95mV/ILED
SHDN (Pin 4): Shutdown Pin. Connect to 1.5V or higher to
enable device; 0.4V or less to disable device.
GND (Pin 5, SC70 Package): Ground Pin. Connect to Pin
2 and to local ground plane
VIN (Pin 5/Pin 6 SC70 Package): Input Supply Pin. Must
be locally bypassed.
VIN (V)
0
I Q
(mA)
0.4
0.8
1.2
1.6
2468
1937 G01
10
2.0
0.2
0.6
1.0
1.4
1.8
2.2
–50
°C
100
°C
25
°C
TEMPERATURE (
°C)
–50
SHDN
PIN
BIAS
CURRENT
(
A)
350
25
1937 G02
200
100
–25
0
50
0
400
300
250
150
75
100
SHDN = 10V
SHDN = 3.6V
SHDN = 3V
SHDN = 2.7V
TEMPERATURE (
°C)
–50
0.8
1.0
1.4
25
75
1937 G03
0.6
0.4
–25
0
50
100
0.2
0
1.2
SWITCHING
FREQUENCY
(MHz)
TEMPERATURE (
°C)
–50
FEEDBACK
BIAS
CURRENT
(nA)
40
50
60
25
75
1937 G04
30
20
–25
0
50
100
10
0
Efficiency vs Temperature
TEMPERATURE (
°C)
–50
EFFICIENCY
(%)
82
83
1937 G05
81
80
0
50
100
85
84
ILED = 20mA
ILED = 15mA
ILED = 10mA
VIN = 3.6V
3 LEDs
DUTY CYCLE (%)
0
350
300
250
200
150
100
50
0
60
1937 G06
20
40
80
100
CURRENT
LIMIT
(mA)
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相关代理商/技术参数 |
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| LT1937ESC6#TRM | 功能描述:IC LED DRVR WHITE BCKLGT SC-70-6 RoHS:否 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:6,000 系列:- 恒定电流:- 恒定电压:- 拓扑:开路漏极，PWM 输出数:4 内部驱动器:是 类型 - 主要:LED 闪烁器 类型 - 次要:- 频率:400kHz 电源电压:2.3 V ~ 5.5 V 输出电压:- 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘 供应商设备封装:8-HVSON 包装:带卷 (TR) 工作温度:-40°C ~ 85°C 其它名称:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND |
| LT1937ESC6#TRMPBF | 功能描述:IC LED DRVR WHITE BCKLGT SC-70-6 RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:6,000 系列:- 恒定电流:- 恒定电压:- 拓扑:开路漏极，PWM 输出数:4 内部驱动器:是 类型 - 主要:LED 闪烁器 类型 - 次要:- 频率:400kHz 电源电压:2.3 V ~ 5.5 V 输出电压:- 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘 供应商设备封装:8-HVSON 包装:带卷 (TR) 工作温度:-40°C ~ 85°C 其它名称:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND |
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