TL2575 Datasheet, PDF (5/23 Pages) Texas Instruments – 1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATORS

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TL2575, TL2575HV
1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATORS
SLVS638 – MAY 2006
TL2575 Electrical Characteristics
I_LOAD = 200 mA, V_IN = 12 V for 3.3-V, 5-V, and adjustable versions, V_IN = 25 V for 12-V version, V_IN = 30 V for 15-V version
(unless otherwise noted) (see Figure 2)
PARAMETER
TEST CONDITIONS
TL2575
T_J
UNIT
MIN
TYP
MAX
TL2575-33
V_IN = 12 V, I_LOAD = 0.2 A
4.75 V ≤ V_IN ≤ 40 V,
0.2 A ≤ I_LOAD ≤ 1 A
25°C
25°C
Full range
3.234
3.168
3.135
3.3 3.366
3.3 3.432
3.465
V_OUT
Output voltage
TL2575-05
TL2575-12
V_IN = 12 V, I_LOAD = 0.2 A
8 V ≤ V_IN ≤ 40 V,
0.2 A ≤ I_LOAD ≤ 1 A
V_IN = 25 V, I_LOAD = 0.2 A
15 V ≤ V_IN ≤ 40 V,
0.2 A ≤ I_LOAD ≤ 1 A
25°C
25°C
Full range
25°C
25°C
Full range
4.9
4.8
4.75
11.76
11.52
11.4
5
5.1
5
5.2
5.25
V
12 12.24
12 12.48
12.6
TL2575-15
V_IN = 30 V, I_LOAD = 0.2 A
18 V ≤ V_IN ≤ 40 V,
0.2 A ≤ I_LOAD ≤ 1 A
25°C
25°C
Full range
14.7
14.4
14.25
15
15.3
15
15.6
15 15.75
Feedback voltage
TL2575-ADJ
V_IN = 12 V, V_OUT = 5 V,
I_LOAD = 0.2 A
8 V ≤ V_IN ≤ 40 V, V_OUT = 5 V,
0.2 A ≤ I_LOAD ≤ 1 A
25°C
25°C
Full range
1.217
1.193
1.18
1.23 1.243
1.23
1.267
V
1.28
TL2575-33 V_IN = 12 V, I_LOAD = 1 A
TL2575-05 V_IN = 12 V, I_LOAD = 1 A
η
Efficiency
TL2575-12
TL2575-15
V_IN = 15 V, I_LOAD = 1 A
V_IN = 18 V, I_LOAD = 1 A
25°C
TL2575-ADJ
V_IN = 12 V, V_OUT = 5 V,
I_LOAD = 1 A
I_IB
Feedback bias current
V_OUT = 5 V (ADJ version only)
25°C
Full range
75
77
88
%
88
77
50
100
nA
500
f_o
Oscillator frequency⁽¹⁾
25°C
47
52
58
kHz
Full range
42
63
V_SAT
I_CL
I_L
I_Q
I_STBY
Saturation voltage
Maximum duty cycle⁽³⁾
Switch peak current⁽¹⁾⁽²⁾
Output leakage current
Quiescent current⁽⁴⁾
Standby quiescent current
I_OUT = 1 A ⁽²⁾
V_IN = 40⁽⁴⁾, Output = 0 V
V_IN = 40⁽⁴⁾, Output = –1 V
OFF (ON/OFF = 5 V)
25°C
Full range
25°C
25°C
Full range
25°C
25°C
25°C
0.9
1.2
V
1.4
93
98
%
1.7
2.8
3.6
A
1.3
4
2
mA
7.5
30
5
10 mA
50
200 µA
(1) In the event of an output short or an overload condition, self-protection features lower the oscillator frequency to ∼18 kHz and the
minimum duty cycle from 5% to ∼2%. The resulting output voltage drops to ∼40% of its nominal value, causing the average power
dissipated by the IC to lower.
(2) Output is not connected to diode, inductor, or capacitor. Output is sourcing current.
(3) FEEDBACK is disconnected from output and connected to 0 V.
(4) To force the output transistor off, FEEDBACK is disconnected from output and connected to 12 V for the adjustable, 3.3-V, and 5-V
versions and to 25 V for the 12-V and 15-V versions.
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