
TPPM0301
400-mA LOW-DROPOUT REGULATOR
WITH AUXILIARY POWER MANAGEMENT
SLVS315 – SEPTEMBER 2000
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range, T
A
= 0
°
C to
70
°
C, C
L
= 4.7
μ
F (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
V(5VCC)/
V(5VAUX)
5-V inputs
4.5
5
5.5
V
I(Q)
Quiescent supply current
From 5VCC or 5VAUX terminals, IL = 0 to
400 mA
2.5
5
mA
From 3.3VAUX terminal, IL = 0 A
250
500
μ
A
IL
I(LIMIT)
T(TSD)
Thys
V(3.3VOUT)
Output load current
0.4
A
Output current limit
3.3VOUT = 0 V
1
1.5
Thermal shutdown
3 3VOUT output shorted to 0 V
3.3VOUT output shorted to 0 V
150
180
°
C
Thermal hysteresis
15
3.3-V output
IL = 400 mA
Minimal ESR to insure stability of regulated
output
3.135
3.3
3.465
V
CL
Load capacitance
4.7
μ
F
Ilkg(REV)
Reverse leakage output current
Tested for input that is grounded.
3.3VAUX, 5VAUX or 5VCC = GND,
3.3VOUT = 3.3 V
50
μ
A
Design targets only. Not tested in production.
5-V detect
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
V(TO_LO)
V(TO_HI)
Threshold voltage, low
5VAUX or 5VCC
↓
3.85
4.05
4.25
V
Threshold voltage, high
5VAUX or 5VCC
↑
4.1
4.3
4.5
V
auxiliary switch
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
R(SWITCH)
Auxiliary switch resistance
5VAUX = 5VCC = 0 V,
3.3VAUX = 3.3 V, IL = 150 mA
5VAUX or 5VCC = 4.5 V to 5.5 V
0.4
VO(
VI)
VO(
IO)
VI – VO
Line regulation voltage
2
mV
Load regulation voltage
20 mA < IL < 400 mA
IL < 400 mA
40
mV
Dropout voltage
1
V
thermal characteristics
PARAMETER
MIN
TYP
MAX
UNIT
°
C/W
°
C/W
R
θ
JC
R
θ
JA
Thermal impedance, junction-to-case
38
Thermal impedance, junction-to-ambient
97