Datasheet

TPS7301Q, TPS7325Q, TPS7330Q, TPS7333Q, TPS7348Q, TPS7350Q
LOW-DROPOUT VOLTAGE REGULATORS
WITH INTEGRATED DELAYED RESET FUNCTION
SLVS124F – JUNE 1995 – REVISED JANUARY 1999
15
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS7301Y electrical characteristics at I
O
= 10 mA, V
I
= 3.5 V, EN = 0 V, C
o
= 4.7 µF (CSR
†
= 1 Ω),
T
J
= 25°C, FB shorted to OUT at device leads (unless otherwise noted)
PARAMETER
TEST CONDITIONS
‡
MIN TYP MAX
UNIT
Reference voltage (measured at FB) 1.182 V
V
I
= 2.4 V, 50 µA ≤ I
O
≤ 150 mA 0.7
V
I
= 2.4 V, 150 mA ≤ I
O
≤ 500 mA 0.83
Pass-element series resistance (See Note 2)
V
I
= 2.9 V, 50 µA ≤ I
O
≤ 500 mA 0.52
Ω
V
I
= 3.9 V, 50 µA ≤ I
O
≤ 500 mA 0.32
V
I
= 5.9 V, 50 µA ≤ I
O
≤ 500 mA 0.23
Input regulation
V
I
= 2.5 V to 10 V,
See Note 1
50 µA ≤ I
O
≤ 500 mA,
3 mV
Out
p
ut regulation
2.5 V ≤ V
I
≤ 10 V,
See Note 1
I
O
= 5 mA to 500 mA,
5 mV
O
u
tp
u
t
reg
u
lation
2.5 V ≤ V
I
≤ 10 V,
See Note 1
I
O
= 50 µA to 500 mA,
7 mV
I
O
= 50 µA 59
Ripple rejection f = 120 Hz
I
O
= 500 mA,
See Note 1
54
dB
Output noise-spectral density f = 120 Hz 2
µV/√Hz
C
o
= 4.7 µF 95
Output noise voltage 10 Hz ≤ f ≤ 100 kHz
C
o
= 10 µF 89
µVrms
C
o
= 100 µF 74
RESET hysteresis voltage
§
Measured at V
O(FB)
12 mV
RESET output low voltage
§
V
I
= 2.13 V, I
O(RESET)
= 400 µA 0.1 V
FB input current 0.1 nA
†
CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance
to C
o
.
‡
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effects must
be taken into account separately.
§
Output voltage programmed to 2.5 V with closed-loop configuration (see application information).
NOTES: 1. When V
I
< 2.9 V and I
O
> 150 mA simultaneously, pass element r
DS(on)
increases (see Figure 33) to a point where the resulting
dropout voltage prevents the regulator from maintaining the specified tolerance range.
2. To calculate dropout voltage, use equation: V
DO
= I
O
⋅ r
DS(on)
r
DS(on)
is a function of both output current and input voltage. The parametric table lists r
DS(on)
for V
I
= 2.4 V, 2.9 V, 3.9 V, and
5.9 V, which corresponds to dropout conditions for programmed output voltages of 2.5 V, 3 V, 4 V, and 6 V respectively. For other
programmed values, refer to Figure 33.