Datasheet

LM3420
www.ti.com SNVS116D –MAY 1998–REVISED MAY 2013
LM3420-16.8
ELECTRICAL CHARACTERISTICS
Specifications with standard type face are for T
J
= 25°C, and those with boldface type apply over full Operating
Temperature Range. Unless otherwise specified, V(IN) = V
REG
, V
OUT
= 1.5V.
LM3420A-16.8 LM3420-16.8
Symbol Parameter Conditions Typical
(1)
Units (Limits)
Limit
(2)
Limit
(2)
V
REG
I
OUT
= 1 mA 16.8 V
Regulation Voltage 16.884/16.968 16.968/17.136 V(max)
16.716/16.632 16.632/16.464 V(min)
Regulation Voltage
I
OUT
= 1 mA ±0.5/±1 ±1/±2 %(max)
Tolerance
I
q
I
OUT
= 1 mA 85 μA
Quiescent Current
110/115 125/150 μA(max)
G
m
20 μA ≤ I
OUT
≤ 1 mA 3.3 mA/mV
V
OUT
= 15V 0.8/0.4 0.7/0.35 mA/mV(min)
Transconductance
ΔI
OUT
/ΔV
REG
1 mA ≤ I
OUT
≤ 15 mA 6.0 mA/mV
V
OUT
= 15V 2.9/0.9 2.5/0.75 mA/mV(min)
A
V
1V ≤ V
OUT
≤ V
REG
− 1.2V (−1.3) 1000 V/V
R
L
= 1 kΩ
(3)
550/250 450/200 V/V(min)
Voltage Gain
ΔV
OUT
/ΔV
REG
1V ≤ V
OUT
≤ V
REG
− 1.2V (−1.3) 3500 V/V
R
L
= 15 kΩ 1200/750 1000/650 V/V(min)
V
SAT
V(IN) = V
REG
+100 mV 1.0 V
Output Saturation
(4)
I
OUT
= 15 mA 1.2/1.3 1.2/1.3 V(max)
I
L
V(IN) = V
REG
−100 mV 0.1 μA
Output Leakage
Current
V
OUT
= 0V 0.5/1.0 0.5/1.0 μA(max)
R
f
392 kΩ
Internal Feedback
490 490 kΩ(max)
Resistor
(5)
294 294 kΩ(min)
E
n
Output Noise Voltage I
OUT
= 1 mA, 10 Hz ≤ f ≤ 10 kHz 280 μV
RMS
(1) Typical numbers are at 25°C and represent the most likely parametric norm.
(2) Limits are 100% production tested at 25°C. Limits over the operating temperature range are specified through correlation using
Statistical Quality Control (SQC) methods. The limits are used to calculate Averaging Outgoing Quality Level (AOQL).
(3) Actual test is done using equivalent current sink instead of a resistor load.
(4) V
SAT
= V(IN) − V
OUT
, when the voltage at the IN pin is forced 100 mV above the nominal regulating voltage (V
REG
).
(5) See Applications and Typical Performance Characteristics sections for information on this resistor.
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