Datasheet

4.5
4.7
4.9
5.1
5.3
5.5
5.7
5.9
6.1
6.3
6.5
±50 ±25 0 25 50 75 100 125 150
High Side Switch Current (A)
T
J
- Junction Temperature (C)
C027
4.5
4.7
4.9
5.1
5.3
5.5
5.7
5.9
6.1
6.3
6.5
0 5 15 20 25 30 4035 45
V
IN
− Input Voltage (V)
High-Side Switch Current (A)
T
J
= −40°C
T
J
= 25°C
T
J
= 150°C
G004
10
0.784
0.789
0.794
0.799
0.804
0.809
0.814
±50 ±25 0 25 50 75 100 125 150
V
FB
- Voltage Referance ( V)
T
J
- Junction Temperature (C)
C026
0
0.05
0.1
0.15
0.2
0.25
−50 −25 0 25 50 75 100 125 150
T
J
− Junction Temperature (°C)
R
DS(ON)
− On-State Resistance (Ω)
BOOT-SW = 3 V
BOOT-SW = 6 V
G001
TPS54340
SLVSBK0B –OCTOBER 2012–REVISED MARCH 2014 www.ti.com
7.6 Timing Requirements
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
ENABLE AND UVLO (EN TERMINAL)
Enable to COMP active V
IN
= 12 V , T
A
= 25°C 540 µs
INTERNAL SOFT-START TIME
Soft-Start Time f
SW
= 500 kHz, 10% to 90% 2.1 ms
Soft-Start Time f
SW
= 2.5 MHz, 10% to 90% 0.42 ms
HIGH-SIDE MOSFET
Minimum controllable on time VIN = 12 V, T
A
= 25°C 135 ns
CURRENT LIMIT
Current limit threshold delay 60 ns
TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK TERMINAL)
Minimum CLK input pulse width 15 ns
RT/CLK falling edge to SW rising edge
Measured at 500 kHz with RT resistor in series 55 ns
delay
PLL lock in time Measured at 500 kHz 78 μs
7.7 Typical Characteristics
V
IN
= 12V
V
IN
= 12 V
Figure 2. On Resistance vs Junction Temperature
Figure 3. Voltage Reference vs Junction Temperature
V
IN
= 12V
V
IN
= 12 V
Figure 5. Switch Current Limit vs Input Voltage
Figure 4. Switch Current Limit vs Junction Temperature
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