TLD5085EJ_1 Datasheet, PDF (8/16 Pages) Infineon Technologies AG – 1.8A DC/DC Step-Down Converter

TLD5085EJ
Buck Regulator
5.2
Electrical Characteristics
Electrical Characteristics: Buck Regulator
V_S = 6.0 V to 40 V, T_j = -40 °C to +150 °C, all voltages with respect to ground (unless otherwise specified)
Pos. Parameter
Symbol
Limit Values Unit Conditions
Min. Typ. Max.
5.2.1
5.2.2
5.2.3
5.2.4
5.2.5
5.2.6
5.2.7
FB input voltage
FB input current
Power-Switch on-resistance
Current transition rise/fall time
Buck peak over current limit
Bootstrap under voltage lockout,
turn-off threshold
V_FB
V_FB
I_FB
R_DS(ON)
t_r
I_BUOC
V_BDS,off
0.588 0.60
0.576 0.60
-1 -0.1
–
–
–
50
2.2 –
V_BUO –
+3.3
0.612 V
0.624 V
0
µA
500 mΩ
–
ns
3.6 A
–
V
V_EN = V_S;
V_S = 12V
0.1A < I_CC < 1.0A
V_EN = V_S;
V_S = 12V
1mA < I_CC < 1.8A
V_FB = 0.6V
I_CC=300 mA;
T_J = 150 °C max.
I_CC=1 A ¹⁾
–
Bootstrap voltage
decreasing
5.2.8 Charge pump current
I_CP
5.2.9
5.2.10
5.2.11
Charge pump switch-off threshold
Maximum duty cycle
Soft start ramp
V_BDS -
V_BUO
D_max
t_start
5.2.12 Input under voltage shutdown
threshold
V_S,off
2
–
–
–
–
5
–
–
100
350 500 750
3.75 –
–
mA V_S = 12V;
V_BUO = V_BDS = GND
V
(V_BDS - V_BUO) increasing
%
1) 2)
µs V_FB rising from 5% to
95% of V_FB,nom
V V_S decreasing
5.2.13
5.2.14
Input voltage startup threshold
Input under voltage shutdown
hysteresis
V_S,on
V_S,hyst
–
–
150 –
4.75
–
V V_S increasing
mV ¹⁾
1) Not subject to production test; specified by design.
2) Consider “Chapter 4.2, Functional Range”
Datasheet
8
Rev. 1.1, 2009-12-16