LP3872_16 Datasheet, PDF (5/28 Pages) Texas Instruments – 1.5-A Fast Ultra-Low-Dropout Linear Regulators

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LP3872, LP3875
SNVS227H – FEBRUARY 2003 – REVISED JANUARY 2015
6.5 Electrical Characteristics
Unless otherwise specified: T_J = 25°C, V_IN = V_O(NOM) + 1 V, I_L = 10 mA, C_OUT = 10 µF, V_SD = 2 V.
PARAMETER
TEST CONDITIONS
MIN ⁽¹⁾
V_OUT
ΔV_OL
ΔV_O/
ΔI_OUT
Output voltage tolerance ⁽³⁾
Output voltage line regulation ⁽³⁾
Output voltage load regulation ⁽³⁾
V_OUT +1 V ≤ V_IN ≤ 7 V, 10 mA ≤ I_L ≤ 1.5 A
V_OUT +1 V ≤ V_IN ≤ 7 V, 10 mA ≤ I_L ≤ 1.5 A,
–40°C ≤ T_J ≤ 125°C
V_OUT + 1 V ≤ V_IN ≤ 7 V
V_OUT + 1 V ≤ V_IN ≤ 7 V, –40°C ≤ T_J ≤ 125°C
10 mA ≤ I_L ≤ 1.5 A
10 mA ≤ I_L ≤ 1.5 A, –40°C ≤ T_J ≤ 125°C
–1.5%
–3%
I_L = 150 mA
V_IN -
V_OUT
Dropout voltage ⁽⁴⁾
I_L = 150 mA, –40°C ≤ T_J ≤ 125°C
I_L = 1.5 A
I_L = 1.5 A, –40°C ≤ T_J ≤ 125°C
I_L = 150 mA
I_GND
Ground pin current in normal
operation mode
I_L = 150 mA,–40°C ≤ T_J ≤ 125°C
I_L = 1.5 A
I_L = 1.5 A, –40°C ≤ T_J ≤ 125°C
I_GND
Ground pin current in shutdown
mode
V_SD ≤ 0.3 V
–40°C ≤ T_J ≤ 85°C
I_O(PK)
Peak output current
V_OUT ≥ V_O(NOM) – 4%
SHORT CIRCUIT PROTECTION
TYP ⁽²⁾
0%
0.02%
0.06%
0.06%
0.12%
38
380
5
6
0.01
1.8
MAX⁽¹⁾ UNIT
1.5%
3%
50
60
mV
450
550
9
10
mA
14
15
10 µA
50
A
I_SC
Short-circuit current
SHUTDOWN INPUT
3.2
A
V_SDT
Shutdown threshold
Output = High
Output = High, –40°C ≤ T_J ≤ 125°C
Output = Low
V_IN
2
V
0
T_dOFF
Turnoff delay
T_dON
Turnon delay
I_SD
SD input current
ERROR FLAG
Threshold
V_T
Threshold hysteresis
V_TH
ERROR flag saturation
V_EF(Sat)
Td
Flag reset delay
Output = Low, –40°C ≤ T_J ≤ 125°C
I_L = 1.5 A
I_L = 1.5 A
V_SD = V_IN
See ⁽⁵⁾
See⁽⁵⁾, –40°C ≤ T_J ≤ 125°C
See ⁽⁵⁾
See⁽⁵⁾, –40°C ≤ T_J ≤ 125°C
I_sink = 100 µA
I_sink = 100 µA, –40°C ≤ T_J ≤ 125°C
0.3
20
µs
25
µs
1
nA
10%
5%
16%
5%
2%
8%
0.02
V
0.1
1
µs
I_lk
ERROR flag pin leakage current
I_max
ERROR flag pin sink current
V_Error = 0.5 V
1
nA
1
mA
(1) Limits are specified by testing, design, or statistical correlation.
(2) Typical numbers are at 25°C and represent the most likely parametric norm.
(3) Output voltage line regulation is defined as the change in output voltage from the nominal value due to change in the input line voltage.
Output voltage load regulation is defined as the change in output voltage from the nominal value due to change in load current. The line
and load regulation specification contains only the typical number. However, the limits for line and load regulation are included in the
output voltage tolerance specification.
(4) Dropout voltage is defined as the minimum input to output differential voltage at which the output drops 2% below the nominal value.
Dropout voltage specification applies only to output voltages of 2.5 V and above. For output voltages below 2.5 V, the dropout voltage is
nothing but the input to output differential, because the minimum input voltage is 2.5 V.
(5) ERROR Flag threshold and hysteresis are specified as percentage of regulated output voltage. See ERROR Flag Operation.
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