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参数资料
| 型号： | TC1303B-FN3EUN |
| 厂商： | Microchip Technology Inc. |
| 英文描述： | 500 mA Synchronous Buck Regulator, + 300 mA LDO with Power-Good Output |
| 中文描述： | 500毫安同步降压稳压器，300 mA的LDO具有电源就绪输出 |
| 文件页数： | 6/30页 |
| 文件大小： | 441K |
| 代理商： | TC1303B-FN3EUN |
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TC1303B
DS21949A-page 6
2005 Microchip Technology Inc.
Wake-Up Time (From SHDN2
mode), (V
OUT2
)
Settling Time (From SHDN2
mode), (V
OUT2
)
Power-Good
Voltage Range PG
t
WK
—
31
100
μs
I
OUT1
= I
OUT2
= 50 mA
t
S
—
100
—
μs
I
OUT1
= I
OUT2
= 50 mA
V
PG
1.0
1.2
—
5.5
5.5
V
T
A
= 0°C to +70°C
T
A
= -40°C to +85°C
V
IN
≤
2.7 I
SINK
= 100 μA
On Rising V
OUT1
or V
OUT2
V
OUTX
= V
OUT1
or V
OUT2
On Falling V
OUT1
or V
OUT2
V
OUTX
= V
OUT1
or V
OUT2
V
OUTX
= V
OUT1
or V
OUT2
PG Threshold High
(V
OUT1
or V
OUT2
)
PG Threshold Low
(V
OUT1
or V
OUT2
)
PG Threshold Hysteresis
(V
OUT1
and V
OUT2
)
PG Threshold Tempco
PG Delay
V
TH_H
—
94
96
% of
V
OUTX
% of
V
OUTX
% of
V
OUTX
ppm/°C
μs
V
TH_L
89
92
—
V
TH_HYS
—
2
—
Δ
V
TH
/
Δ
T
t
RPD
—
—
30
165
—
—
V
OUT1
or V
OUT2
= (V
TH
+ 100 mV)
to (V
TH
- 100 mV)
V
OUT1
or V
OUT2
= V
TH
- 100 mV
to V
TH +
100 mV,
I
SINK
= 1.2 mA
V
OUT1
or V
OUT2
= V
TH
- 100 mV
,
I
PG
= 1.2 mA V
IN2
> 2.7V
I
PG
= 100 μA, 1.0V < V
IN2
< 2.7V
V
OUT1
or V
OUT2
= V
TH
+ 100 mV
V
OUT2
≥
1.8V, I
PG
= - 500 μA
V
OUT2
< 1.8V,I
PG
= - 300 μA
PG Active Time-out Period
t
RPU
140
262
560
ms
PG Output Voltage Low
PG_V
OL
—
—
0.2
V
PG Output Voltage High
PG_V
OH
0.9* V
OUT2
—
—
V
DC CHARACTERISTICS (CONTINUED)
Electrical Characteristics:
V
IN1
=V
IN2
= SHDN1,2 = 3.6V, C
OUT1
= C
IN
= 4.7 μF, C
OUT2
= 1μF, L
= 4.7 μH, V
OUT1
(ADJ) = 1.8V,
I
OUT1
= 100 ma, I
OUT2
= 0.1 mA T
A
= +25°C.
Boldface
specifications apply over the T
A
range of
-40°C to +85°C
.
Parameters
Sym
Min
Typ
Max
Units
Conditions
Note
1:
2:
3:
4:
The Minimum V
IN
has to meet two conditions: V
IN
≥
2.7V and V
IN
≥
V
RX
+ V
DROPOUT,
V
RX
= V
R1
or V
R2
.
V
RX
is the regulator output voltage setting.
TCV
OUT2
= ((V
OUT2max
– V
OUT2min
) * 10
6
)/(V
OUT2
* D
T
).
Regulation is measured at a constant junction temperature using low duty cycle pulse testing. Load regulation is tested
over a load range from 0.1 mA to the maximum specified output current.
Dropout voltage is defined as the input to output voltage differential at which the output voltage drops 2% below its
nominal value measured at a 1V differential.
The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction
temperature and the thermal resistance from junction to air. (i.e. T
A
, T
J
,
θ
JA
). Exceeding the maximum allowable power
dissipation causes the device to initiate thermal shutdown.
The integrated MOSFET switches have an integral diode from the L
X
pin to V
IN
, and from L
X
to P
GND
. In cases where
these diodes are forward-biased, the package power dissipation limits must be adhered to. Thermal protection is not
able to limit the junction temperature for these cases.
V
IN1
and V
IN2
are supplied by the same input source.
5:
6:
7:
8:
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TC1303B-IA0EMF | 功能描述:低压差稳压器 - LDO PWM/LDO combo w/PG RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| TC1303B-IA0EMFTR | 功能描述:低压差稳压器 - LDO PWM/LDO combo w/PG RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| TC1303B-IA0EUN | 功能描述:低压差稳压器 - LDO PWM/LDO combo w/PG RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| TC1303B-IA0EUNTR | 功能描述:低压差稳压器 - LDO PWM/LDO combo w/PG RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| TC1303B-PA0EMF | 功能描述:低压差稳压器 - LDO PWM/LDO combo w/PG RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
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