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PDF TC110 Data sheet ( Hoja de datos )
| Número de pieza | TC110 | |
| Descripción | PFM/PWM Step-Up DC/DC Controller | |
| Fabricantes | Microchip | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TC110 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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TC110
PFM/PWM Step-Up DC/DC Controller
Features
• Assured Start-up at 0.9V
• 50µA (Typ) Supply Current (fOSC = 100kHz)
• 300mA Output Current @ VIN ≥ 2.7V
• 0.5µA Shutdown Mode
• 100kHz and 300kHz Switching Frequency
Options
• Programmable Soft-Start
• 84% Typical Efficiency
• Small Package: 5-Pin SOT-23A
Applications
• Palmtops
• Battery-Operated Systems
• Positive LCD Bias Generators
• Portable Communicators
Device Selection Table
Part
Number
Output
Voltage
(V)*
Package
Osc.
Freq.
(kHz)
Operating
Temp.
Range
TC110501ECT 5.0 5-Pin SOT-23A 100 -40°C to +85°C
TC110331ECT 3.3 5-Pin SOT-23A 100 -40°C to +85°C
TC110301ECT 3.0 5-Pin SOT-23A 100 -40°C to +85°C
TC110503ECT 5.0 5-Pin SOT-23A 300 -40°C to +85°C
TC110333ECT 3.3 5-Pin SOT-23A 300 -40°C to +85°C
TC110303ECT 3.0 5-Pin SOT-23A 300 -40°C to +85°C
*Other output voltages are available. Please contact
Microchip Technology Inc. for details.
Package Type
5-Pin SOT-23A
EXT GND
54
General Description
The TC110 is a step-up (Boost) switching controller
that furnishes output currents of up to 300mA while
delivering a typical efficiency of 84%. The TC110
normally operates in pulse width modulation mode
(PWM), but automatically switches to pulse frequency
modulation (PFM) at low output loads for greater
efficiency. Supply current draw for the 100kHz version
is typically only 50µA, and is reduced to less than
0.5µA when the SHDN input is brought low. Regulator
operation is suspended during shutdown. The TC110
accepts input voltages from 2.0V to 10.0V, with a
guaranteed start-up voltage of 0.9V.
The TC110 is available in a small 5-Pin SOT-23A
package, occupies minimum board space and uses
small external components (the 300kHz version allows
for less than 5mm surface-mount magnetics).
Functional Block Diagram
+
Battery
3V
–
+
10µF
5
EXT
VOUT
1
4
GND
TC110
VDD SHDN/SS
23
47µH
D1
IN5817
Si9410DY
+
47µF
Tantalum
VOUT
R
C
OFF ON
3V to 5V Supply
*RC Optional
TC110
1
VOUT
23
VDD SHDN/SS
NOTE: 5-Pin SOT-23A is equivalent to the EIAJ SC-74A
© 2002 Microchip Technology Inc.
DS21355B-page 1
1 page  
FIGURE 3-1:
BOOTSTRAPPED OPERATION
L1
100µH
D1
IN5817
54
EXT GND
TC110XX
VOUT
C1
33µF 1
VDD
2
SHDN
3
+
VIN
–
n
MTP3055EL C2
47µF
OFF ON
TC110
VOUT
FIGURE 3-2:
NON-BOOTSTRAPPED OPERATION
+
– VIN
L1
100µH
D1
IN5817
5
EXT
4
GND
TC110XX
VOUT
VDD
SHDN
123
n
MTP3055EL C2
47µF
C1
33µF
OFF ON
FIGURE 3-3:
SOFT START/SHUTDOWN CIRCUIT
VOUT
TC110XX
SHDN/SS
3
RSS
470K
CSS
0.1µF
VIN
Shutdown Not Used
© 2002 Microchip Technology Inc.
TC110XX
SHDN/SS
3
RSS
470K
CSS
0.1µF
SHDN
Shutdown Used
DS21355B-page 5
5 Page 
6.0 PACKAGING INFORMATION
6.1 Package Marking Information
1 represents product classification; TC110 = M
2 represents first integer of voltage and frequency
Symbol
(100kHz)
B
C
D
E
F
H
Symbol
(300kHz)
1
2
3
4
5
6
Voltage
1.
2.
3.
4.
5.
6.
3 represents first decimal of voltage and frequency
Symbol
(100kHz)
0
1
2
3
4
5
6
7
8
9
Symbol
(300kHz)
A
B
C
D
E
F
H
K
L
M
4 represents production lot ID code
Voltage
.0
.1
.2
.3
.4
.5
.6
.7
.8
.9
TC110
© 2002 Microchip Technology Inc.
DS21355B-page 11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet TC110.PDF ] | |
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