LP2951-N_15_15 Datasheet, PDF (8/50 Pages) Texas Instruments – LP295x-N Series of Adjustable Micropower Voltage Regulators

LP2950-N, LP2951-N
SNVS764O – JANUARY 2000 – REVISED DECEMBER 2014
www.ti.com
Electrical Characteristics (continued)
over operating free-air temperature range (unless otherwise noted)⁽¹⁾
PARAMETER
TEST CONDITIONS⁽¹⁾
ERROR COMPARATOR
Output leakage
current
V_OH = 30 V
V_OH = 30 V, –40°C ≤ T_J ≤
125°C
LP2951 ⁽²⁾
MIN TYP MAX
0.01
1
2
Output low voltage
Upper threshold
voltage
V_in = (V_ONOM − 0.5)V,
I_OL = 400 μA
V_in = (V_ONOM − 0.5)V,
I_OL = 400 μA,
–40°C ≤ T_J ≤ 125°C
See ⁽¹²⁾
See⁽¹²⁾, –40°C ≤ T_J ≤
125°C
Lower threshold
voltage
See ⁽¹²⁾
See⁽¹²⁾, –40°C ≤ T_J ≤
125°C
Hysteresis
See ⁽¹²⁾
SHUTDOWN INPUT
Input
Logic voltage
Low (Regulator ON),
–40°C ≤ T_J ≤ 125°C
Logic voltage
High (Regulator OFF),
–40°C ≤ T_J ≤ 125°C
V_shutdown = 2.4 V
Shutdown pin input
current
V_shutdown = 2.4 V
–40°C ≤ T_J ≤ 125°C
V_shutdown = 30 V
Regulator output
current in
shutdown
V_shutdown = 30 V,
–40°C ≤ T_J ≤ 125°C
See ⁽¹³⁾
–40°C ≤ T_J ≤ 125°C
150
250
400
40
60
25
75
95
140
15
1.3
0.6
2
30
50
100
450
600
750
3
10
20
LP2950AC-XX
LP2951AC-XX
MIN TYP MAX
LP2950C-XX
LP2951C-XX
MIN TYP MAX
UNIT
0.01
1
2
150 250
400
400
40
60
25
75
95
140
15
0.01
1 μA⁽⁴⁾
μA ⁽⁴⁾
2 μA⁽⁵⁾
150 250 mV⁽⁴⁾
400 mV⁽⁴⁾
400 mV⁽⁵⁾
40
60
mV ⁽⁴⁾
mV ⁽⁴⁾
25
mV ⁽⁵⁾
75
95 mV⁽⁴⁾
mV ⁽⁴⁾
140 mV⁽⁵⁾
15
mV
1.3
0.7
2
30
50
100
450 600
750
3
10
20
1.3
V
V ⁽⁴⁾
0.7
V ⁽⁵⁾
V ⁽⁴⁾
2
V ⁽⁵⁾
30
50 μA⁽⁴⁾
μA ⁽⁴⁾
100 μA⁽⁵⁾
450 600 μA⁽⁴⁾
μA ⁽⁴⁾
750 μA⁽⁵⁾
3
10 μA⁽⁴⁾
μA ⁽⁴⁾
20 μA⁽⁵⁾
(12) Comparator thresholds are expressed in terms of a voltage differential at the Feedback terminal below the nominal reference voltage
measured at V_in = (V_ONOM + 1)V. To express these thresholds in terms of output voltage change, multiply by the error amplifier gain =
V_OUT/V_REF = (R1 + R2)/R2.For example, at a programmed output voltage of 5 V, the Error output is specified to go low when the output
drops by 95 mV × 5 V/1.235 V = 384 mV. Thresholds remain constant as a percent of V_out as V_out is varied, with the dropout warning
occurring at typically 5% below nominal, 7.5% ensured.
(13) V_SHUTDOWN ≥ 2 V, V_IN ≤ 30 V, V_OUT = 0, Feedback pin tied to V_TAP.
8
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