TPS54560B-Q1 Datasheet, PDF (6/45 Pages) Texas Instruments – 4.5 V to 60 V Input, 5 A, Step Down DC-DC Converter with Eco-mode

TPS54560B-Q1
SLVSDP8 – FEBRUARY 2017
6.6 Timing Requirements
PARAMETER
TEST CONDITIONS
ENABLE AND UVLO (EN TERMINAL)
Enable to COMP active
INTERNAL SOFT-START TIME
V_IN = 12 V, T_A = 25°C
Soft-Start Time
Soft-Start Time
ERROR AMPLIFIER
f_SW = 500 kHz, 10% to 90%
f_SW = 2.5 MHz, 10% to 90%
Error amplifier transconductance (g_M)
–2 μA < I_COMP < 2 μA, V_COMP = 1 V
Error amplifier transconductance (g_M) during
soft-start
–2 μA < I_COMP < 2 μA, V_COMP = 1 V, V_FB = 0.4 V
CURRENT LIMIT
Current limit threshold delay
TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK TERMINAL)
Minimum CLK input pulse width
RT/CLK falling edge to SW rising edge
delay
Measured at 500 kHz with RT resistor in series
PLL lock in time
Measured at 500 kHz
6.7 Typical Characteristics
www.ti.com
MIN
TYP
MAX UNIT
340
µs
2.1
ms
0.42
ms
350
μs
77
μs
60
ns
15
ns
55
ns
78
μs
0.25
0.2
0.15
0.1
0.05
BOOT-SW = 3 V
0
±50 ±25
V_IN = 12 V
BOOT-SW = 6 V
0 25 50 75 100 125 150
T_J - Junction Temperature (ƒC)
C025
Figure 1. On Resistance vs Junction Temperature
9.5
4.5
9
12
60
8.5
8
7.5
7
6.5
6
-40 -10
20
50
80 110 140 170
Temperature Junction (Tj)
D001
V_IN = 12 V
Figure 3. Switch Current Limit vs Junction Temperature
0.814
0.809
0.804
0.799
0.794
0.789
0.784
±50 ±25 0
25 50 75 100 125 150
T_J - Junction Temperature (ƒC)
C026
V_IN = 12 V
Figure 2. Voltage Reference vs Junction Temperature
9
8.5
8
7.5
7
6.5
6
0
-40 qC
25 qC
150 qC
10
20
30
40
50
60
Input Voltage (V)
D002
Figure 4. Switch Current Limit vs Input Voltage
6
Submit Documentation Feedback
Product Folder Links: TPS54560B-Q1
Copyright © 2017, Texas Instruments Incorporated