LM2597HVM-12 National Semiconductor, LM2597HVM-12 Datasheet - Page 7

• Manufacturer Part Number: LM2597HVM-12
• Description: SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator/ with Features
• Manufacturer: National Semiconductor

Typical Performance Characteristics
Continuous Mode Switching Waveforms
V
L = 100 µH, C
A: Output Pin Voltage, 10V/div.
B: Inductor Current 0.2A/div.
C: Output Ripple Voltage, 20 mV/div.
Load Transient Response for Continuous Mode
V
L = 100 µH, C
A: Output Voltage, 50 mV/div. (AC)
B: 200 mA to 500 mA Load Pulse
Connection Diagrams and Ordering Information
IN
IN
= 20V, V
= 20V, V
LM2597HVN-12 or LM2597HVN-ADJ
LM2597HVN-3.3, LM2597HVN-5.0,
Horizontal Time Base: 50 µs/div.
OUT
OUT
Horizontal Time Base: 2 µs/div.
See NS Package Number N08E
LM2597N-5.0, LM2597N-12 or
Order Number LM2597N-3.3,
OUT
OUT
= 5V, I
= 5V, I
= 120 µF, C
= 120 µF, C
8–Lead DIP (N)
LM2597N-ADJ
LOAD
LOAD
Top View
= 400 mA
= 200 mA to 500 mA
OUT
OUT
ESR = 140 m
ESR = 140 m
DS012440-23
DS012440-21
DS012440-19
Discontinuous Mode Switching Waveforms
V
L = 33 µH, C
A: Output Pin Voltage, 10V/div.
B: Inductor Current 0.2A/div.
C: Output Ripple Voltage, 20 mV/div.
Load Transient Response for Discontinuous Mode
V
L = 33 µH, C
A: Output Voltage, 50 mV/div. (AC)
B: 100 mA to 200 mA Load Pulse
(Continued)
7
IN
IN
= 20V, V
= 20V, V
LM2597HVM-12 or LM2597HVM-ADJ
Horizontal Time Base: 200 µs/div.
LM2597HVM-3.3, LM2597HVM-5.0,
OUT
Horizontal Time Base: 2 µs/div.
OUT
See NS Package Number M08A
OUT
OUT
LM2597M-5.0, LM2597M-12 or
Order Number LM2597M-3.3,
8–Lead Surface Mount (M)
= 5V, I
= 5V, I
= 220 µF, C
= 220 µF, C
LM2597M-ADJ
LOAD
LOAD
Top View
= 200 mA
= 100 mA to 200 mA
OUT
OUT
ESR = 60 m
ESR = 60 m
DS012440-24
DS012440-20
DS012440-22
www.national.com