Datasheet

LM2591HV
www.ti.com SNVS074D –MAY 2001–REVISED APRIL 2013
ELECTRICAL CHARACTERISTICS LM2591HV-5.0
Specifications with standard type face are for T
J
= 25°C, and those with boldface type apply over full Operating
Temperature Range.
Symbol Parameter Conditions LM2591HV-5.0 Units
(Limits)
Typ
(1)
Limit
(2)
SYSTEM PARAMETERS Test Circuit Test Circuit and Layout Guidelines
(3)
V
OUT
Output Voltage 7V ≤ V
IN
≤ 60V, 0.2A ≤ I
LOAD
≤ 1A 5 V
4.800/4.750 V(min)
5.200/5.250 V(max)
η Efficiency V
IN
= 12V, I
LOAD
= 1A 82 %
(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 ensured 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 LM2591HV is used as shown in Test Circuit and Layout Guidelines test circuit, system performance will be as shown in
Electrical Characteristics.
ELECTRICAL CHARACTERISTICS LM2591HV-ADJ
Specifications with standard type face are for T
J
= 25°C, and those with boldface type apply over full Operating
Temperature Range.
Symbol Parameter Conditions LM2591HV-ADJ Units
(Limits)
Typ
(1)
Limit
(2)
SYSTEM PARAMETERS Test Circuit Test Circuit and Layout Guidelines
(3)
V
FB
Feedback Voltage 4.5V ≤ V
IN
≤ 60V, 0.2A ≤ I
LOAD
≤ 1A 1.230 V
V
OUT
programmed for 3V. Circuit of Test Circuit and 1.193/1.180 V(min)
Layout Guidelines. 1.267/1.280 V(max)
η Efficiency V
IN
= 12V, V
OUT
= 3V, I
LOAD
= 1A 76 %
(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 ensured 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 LM2591HV is used as shown in Test Circuit and Layout Guidelines test circuit, system performance will be as shown in
Electrical Characteristics.
ELECTRICAL CHARACTERISTICS ALL OUTPUT VOLTAGE VERSIONS
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
= 12V for the 3.3V, 5V, and Adjustable version. I
LOAD
= 500 mA
Symbol Parameter Conditions LM2591HV-XX Units
(Limits)
Typ
(1)
Limit
(2)
DEVICE PARAMETERS
I
b
Feedback Bias Current Adjustable Version Only, V
FB
= 1.3V 10 nA
50/100 nA (max)
f
O
Oscillator Frequency See
(3)
150 kHz
127/110 kHz(min)
173/173 kHz(max)
V
SAT
Saturation Voltage I
OUT
= 1A
(4)(5)
0.95 V
1.2/1.3 V(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 ensured 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.
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