Datasheet
LM3433
www.ti.com
SNVS535C –OCTOBER 2007–REVISED MAY 2013
ELECTRICAL CHARACTERISTICS
Specifications in standard type face are for T
J
= 25°C and those with boldface type apply over the full Operating
Temperature Range ( T
J
= −40°C to +125°C). Minimum and Maximum limits are specified through test, design, or statistical
correlation. Typical values represent the most likely parametric norm at T
J
= +25ºC, and are provided for reference purposes
only. Unless otherwise stated the following conditions apply: V
EE
= -12.0V and V
IN
= +3.3V with respect to CGND.
Symbol Parameter Conditions Min
(1)
Typ
(2)
Max
(1)
Units
SUPPLY CURRENT
I
IN
V
EE
V
EE
Quiescent Current EN = CGND 3 19 µA
EN = V
IN
, Not Switching 1.0 mA
I
IN
V
IN
V
IN
Quiescent Current EN = V
IN
, Not Switching 300
µA
EN = CGND 35 71
OUTPUT CURRENT CONTROL
V
CS
Current sense target voltage; V
ADJ
= V
IN
57 60 63 mV
V
CS
= V
CSP
– V
CSN
G
ADJ
I
ADJ
Gain = (V
ADJ
-CGND)/(V
CNP
-V
CSN
) V
IN
= 3.3V, V
ADJ
= 0.5V or 1.5V w.r.t.
15 16.67 18 V/V
CGND
I
CSN
Isense Input Current V
ADJ
= 1V w.r.t. CGND -50
µA
V
ADJ
= V
IN
10
I
CSP
Isense Input Current V
ADJ
= V
IN
60
µA
V
ADJ
= 1V w.r.t. CGND 1
Gm CS to COMP Transconductance; Gm = I
COMP
0.6 1.3 2.2 mS
/ (V
CSP
– V
CSN
- V
ADJ
/16.67)
ON TIME CONTROL
T
ONTH
On time threshold V
T
ON
- V
EE
at terminate ON time event
230 287 334 mV
GATE DRIVE AND INTERNAL REGULATOR
V
CCOUT
V
CC
output regulation w.r.t. V
EE
I
CC
= 0mA to 20mA 6.3 6.75 7.1 V
V
CCILIM
V
CC
current limit V
CC
= V
EE
33 53 mA
R
OLH
HO output low resistance I = 50mA source 2
Ω
R
OHH
HO output high resistance I = 50mA sink 3
R
OLL
LO output low resistance I = 50mA source 2
Ω
R
OHL
LO output high resistance I = 50mA sink 3
R
OLP
DIMO output low resistance I = 5mA source 20
Ω
R
OHP
DIMO output high resistance I = 5mA sink 30
FUNCTIONAL CONTROL
V
INUVLO
V
IN
undervoltage lockout With respect to CGND 1.4 V
V
CCUVLO
V
CC
- V
EE
undervoltage lockout thresholds On Threshold 6.0 6.6 7.0
V
Off threshold 4.9 5.4 5.8
V
EN
Enable threshold, with respect to CGND Device on w.r.t. CGND 1.6
V
Device off w.r.t. CGND 0.6
R
EN
Enable pin pullup resistor 100 kΩ
V
DIM
DIM logic input threshold DIM rising threshold w.r.t. CGND 1.6
V
DIM falling threshold w.r.t. CGND 0.6
R
DIM
DIM pin pulldown resistor 100 kΩ
I
ADJ
ADJ pin current -1.0 1.0 µA
I
SS
SS pin source current 10 µA
R
SS
SS pin pulldown resistance EN = CGND 1.0 kΩ
(1) All limits specified at room temperature (standard typeface) and at temperature extremes (bold typeface). All room temperature limits are
100% production tested. All limits at temperature extremes are ensured via correlation using standard Statistical Quality Control (SQC)
methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(2) Typical numbers are at 25°C and represent the most likely norm.
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