參數(shù)資料
型號(hào)： TC126503ECT
廠商： Microchip Technology Inc.
英文描述： PFM Step-Up DC/DC Regulators
中文描述： PFM步升直流/直流穩(wěn)壓器
文件頁(yè)數(shù)： 2/12頁(yè)
文件大小： 459K
代理商： TC126503ECT
TC125/TC126
DS21372B-page 2
2002 Microchip Technology Inc.
1.0
ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
Voltage on V
DD
, SENSE/V
DD
, LX, SHDN Pins
.......................................................-0.3V to +12V
LX Sink Current............................................400mA pk
Power Dissipation.............................................150mW
Operating Temperature Range.............-40°C to +85°C
Storage Temperature Range..............-40°C to +125°C
*Stresses above those listed under "Absolute Maximum
Ratings" may cause permanent damage to the device. These
are stress ratings only and functional operation of the device
at these or any other conditions above those indicated in the
operation sections of the specifications is not implied.
Exposure to Absolute Maximum Rating conditions for
extended periods may affect device reliability.
TC125/TC126 ELECTRICAL SPECIFICATIONS
Electrical Characteristics:
V
IN
= V
OUT
x 0.6, T
A
= 25°C, SHDN = V
OUT
(TC125), unless otherwise noted.
Symbol
Parameter
Min
Typ
Max
Units
Test Conditions
V
OUT
V
DD
V
START
I
DD
Output Voltage
Operating Supply Voltage
Start-Up Supply Voltage
Operating Supply Current
TC125
TC125/126
TC125/126
No Load Supply Current
V
R
– 2.5%
0.70
—
V
R
± 0.5%
—
0.80
V
R
+ 2.5%
10.0
0.90
V
V
V
μ
A
Note 4
I
OUT
= 1mA
(Note 2)
V
OUT
= 2V, I
OUT
= 10mA
V
OUT
= 3V, I
OUT
= 30mA
V
OUT
= 5V, I
OUT
= 50mA
I
OUT
= 0, V
OUT
= 2V
V
OUT
= 3V
V
OUT
= 5V
V
IN
= V
OUT
+ 0.5V, V
IN
= 2V
—
—
—
—
—
—
—
—
—
—
—
—
—
14
20
32
5
5
6
2
3
3
—
10
6
3
28
40
64
9
10
11
4
5
5
0.5
14
8
5
I
NL
μ
A
I
STBY
Standby Supply Current
μ
A
V
IN
= 3V
V
IN
= 5V
I
SHDN
R
LX(ON)
Shutdown Supply Current
LX Pin ON Resistance
μ
A
SHDN = V
IL
, (Note 2)
V
LX
= 0.4V, V
OUT
= 2V
V
OUT
= 3V
V
OUT
= 5V
(Note 2), (Note 3)
No external components,
V
OUT
= V
LX
= 10V
Measured at LX pin (Note 2)
Note 2
Note 2
V
OUT
= 2V
V
OUT
= 3V
V
OUT
= 5V
I
LX
LX Pin Leakage Current
—
—
1
μ
A
D
CYCLE
f
MAX
VLX
LIM
η
Duty Cycle
Maximum Oscillator Frequency
LX Pin Limit Voltage
Efficiency
70
85
0.7
—
—
—
0.75
—
—
-0.25
75
100
—
70
80
85
—
—
—
—
80
115
1.1
—
—
—
—
0.20
0.25
—
%
kHz
V
%
V
IH
V
IL
II
N
H
II
N
L
Note
SHDN Input Logic High
SHDN Input Logic Low
SHDN Input Current (High)
SHDN Pin Input Current (Low)
V
V
μ
A
μ
A
1:
2:
3:
4:
V
R
is the factory output voltage setting.
V
IN
= V
x 0.95.
V
input tied to SENSE input for TC126, as shown in Figure 3-2.
The V
PS
input of the TC125 must be operated between 2.0V and 10.0V for spec compliance.
The V
DD
input of the TC126 must be operated between 2.2V and 10.0V for spec compliance.
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