TS2508A_12 Datasheet, PDF (2/8 Pages) Taiwan Semiconductor Company, Ltd – 3A / 330KHz PWM Buck Converter

TS2508A
3A / 330KHz PWM Buck Converter
Electrical Specifications (V_IN=12V, Ta=25^oC unless otherwise noted)
Characteristics
Symbol
Conditions
Min
Feedback Voltage
Quiescent Current
Feedback Bias Current
Shutdown Supply Current
OCSET pin bias current
Switch Current
Line Regulation
Load Regulation
Oscillation Frequency
EN Pin Logic input
threshold voltage
EN Pin Input Current
Soft-Start Time
Internal P-MOS R_DSON
Efficiency
I_OUT = 3A-- 91--
V_FB
I_q
I_FB
I_SD
I_OCSET
I_SW
∆V_OUT/V_OUT
I_OCSET
F_OSC
V_SH
V_SL
I_SH
I_SL
T_SS
R_DSON
E_FFI
I_OUT =0.1A
V_FB =1.2V force driver off
I_OUT =0.1A
V_EN =0V
V_CC = 5V~20V, I_OUT =0.2A
I_OUT = 0.1 to 3A
SW pin
High (regulator ON)
Low (regulator OFF)
V_EN =2.5V (ON)
V_EN =0.3V (OFF)
V_CC = 5V, V_FB = 0V
V_CC = 12V, V_FB = 0V
V_CC = 12V,
V_OUT = 5V
I_OUT = 2A
I_OUT = 3A
0.784
--
--
--
110
4
--
--
260
2.0
--
--
--
0.3
--
--
--
--
Typ
0.800
3
0.1
2
130
--
1
0.3
330
--
--
20
-10
4
90
55
92
91
Max
0.816
5
0.5
10
150
--
2
0.5
400
--
0.8
--
--
8
140
90
--
--
Units
V
mA
uA
uA
uA
A
%
%
KHz
V
uA
uA
ms
mΩ
mΩ
%
Block Diagram
Pin Assignment
Name
Description
FB Feedback pin
H:Normal operation (Step-down)
EN L:Step-down operation stopped (All circuit
deactivated)
Add an external resistor to set max switch output
OCSET
current.
Vcc IC power supply pin
2/8
Name
Description
Vss GND pin
Vss GND pin
Switch pin. Connect external
SW
inductor & diode here
Switch pin. Connect external
SW
inductor & diode here
Version: C12