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LM2599S-3.3 数据表(PDF) 5 Page - Texas Instruments

部件名 LM2599S-3.3
功能描述  LM2599 SIMPLE SWITCHER Power Converter 150 kHz 3A Step-Down Voltage Regulator
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

LM2599S-3.3 数据表(HTML) 5 Page - Texas Instruments

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LM2599
www.ti.com
SNVS123C – APRIL 1998 – REVISED APRIL 2013
LM2599-ADJ Electrical Characteristics
Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating
Temperature Range.
Symbol
Parameter
Conditions
LM2599-ADJ
Units
(Limits)
Typ
Limit
(1)
(2)
SYSTEM PARAMETERS (3) Test Circuit Figure 24
VFB
Feedback Voltage
4.5V
≤ VIN ≤ 40V, 0.2A ≤ ILOAD ≤ 3A
1.230
V
VOUT programmed for 3V. Circuit of Figure 24.
1.193/1.180
V(min)
1.267/1.280
V(max)
η
Efficiency
VIN = 12V, VOUT = 3V, ILOAD = 3A
73
%
(1)
Typical numbers are at 25°C and represent the most likely norm.
(2)
All limits ensured at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits
are 100% production tested. All limits at temperature extremes are specified via correlation using standard Statistical Quality Control
(SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(3)
External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance.
When the LM2599 is used as shown in the Figure 24 test circuit, system performance will be as shown in system parameters of
Electrical Characteristics section.
All Output Voltage Versions Electrical Characteristics
Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating
Temperature Range. Unless otherwise specified, VIN = 12V for the 3.3V, 5V, and Adjustable version and VIN = 24V for the
12V version. ILOAD = 500 mA
Symbol
Parameter
Conditions
LM2599-XX
Units
(Limits)
Typ
Limit
(1)
(2)
DEVICE PARAMETERS
Ib
Feedback Bias Current
Adjustable Version Only, VFB = 1.3V
10
nA
50/100
nA (max)
fO
Oscillator Frequency
See (3)
150
kHz
127/110
kHz(min)
173/173
kHz(max)
VSAT
Saturation Voltage
IOUT = 3A
(4) (5)
1.16
V
1.4/1.5
V(max)
DC
Max Duty Cycle (ON)
See (5)
100
%
Min Duty Cycle (OFF)
See (6)
0
ICL
Current Limit
Peak Current, (4) (5)
4.5
A
3.6/3.4
A(min)
6.9/7.5
A(max)
IL
Output Leakage Current
See (4) (6) (7)
Output = 0V
50
μA(max)
Output =
−1V
2
mA
30
mA(max)
IQ
Operating Quiescent
SD /SS Pin Open (6)
5
mA
Current
10
mA(max)
(1)
Typical numbers are at 25°C and represent the most likely norm.
(2)
All limits ensured at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits
are 100% production tested. All limits at temperature extremes are specified via correlation using standard Statistical Quality Control
(SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(3)
The switching frequency is reduced when the second stage current limit is activated. The amount of reduction is determined by the
severity of current overload.
(4)
No diode, inductor or capacitor connected to output pin.
(5)
Feedback pin removed from output and connected to 0V to force the output transistor switch ON.
(6)
Feedback pin removed from output and connected to 12V for the 3.3V, 5V, and the ADJ. version, and 15V for the 12V version, to force
the output transistor switch OFF.
(7)
VIN = 40V.
Copyright © 1998–2013, Texas Instruments Incorporated
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