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参数资料
| 型号： | LM2594APDBCKGEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 4/25页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR LM2594APDBCKG |
| 设计资源： | LM2594APDBCKGEVB BOM LM2594APDBCKGEVB Schematic LM2594APDBCKGEVB Gerber Files |
| 特色产品： | Evaluation Boards & Kits |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 5V |
| 电流 - 输出： | 500mA |
| 输入电压： | 4.5 ~ 40 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 150kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | LM2594 |
| 其它名称： | LM2594ADPBCKGEVB LM2594ADPBCKGEVBOS LM2594APDBCKGEVBOS |
LM2594
SYSTEM PARAMETERS
ELECTRICAL CHARACTERISTICS Specifications with standard type face are for T J = 25 ° C, and those with boldface type apply
over full Operating Temperature Range ? 40 ° C to +125 ° C
Characteristics
Symbol
Min
Typ
Max
Unit
LM2594 (Note 1, Test Circuit Figure 16)
Feedback Voltage (V in = 12 V, I Load = 0.1 A, V out = 5.0 V, )
V FB_nom
1.23
V
Feedback Voltage (8.0 V ≤ V in ≤ 40 V, 0.1 A ≤ I Load ≤ 0.5 A, V out = 5.0 V)
Efficiency (V in = 12 V, I Load = 0.5 A, V out = 5.0 V)
V FB
η
1.193
1.18
?
80
1.267
1.28
V
%
Characteristics
Feedback Bias Current (V out = 5.0 V)
Oscillator Frequency (Note 2)
Saturation Voltage (I out = 0.5 A, Notes 3 and 4)
Max Duty Cycle “ON” (Note 4)
Current Limit (Peak Current, Notes 3 and 4)
Output Leakage Current (Notes 5 and 6)
Output = 0 V
Output = ? 1.0 V
Quiescent Current (Note 5)
Standby Quiescent Current (ON/OFF Pin = 5.0 V (“OFF”))
(Note 6)
Symbol
I b
f osc
V sat
DC
I CL
I L
I Q
I stby
Min
135
120
0.7
0.65
Typ
25
150
1.0
95
1.0
0.5
13
5.0
50
Max
100
200
165
180
1.2
1.4
1.6
1.8
2.0
30
10
200
250
Unit
nA
kHz
V
%
A
mA
mA
m A
ON/OFF PIN LOGIC INPUT
Threshold Voltage
1.6
V
V out = 0 V (Regulator OFF)
V out = Nominal Output Voltage (Regulator ON)
V IH
V IL
2.2
2.4
1.0
0.8
V
V
ON/OFF Pin Input Current
ON/OFF Pin = 5.0 V (Regulator OFF)
ON/OFF Pin = 0 V (regulator ON)
I IH
I IL
?
?
15
0.01
30
5.0
m A
m A
1. External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance.
When the LM2594 is used as shown in the Figure 16 test circuit, system performance will be as shown in system parameters section .
2. The oscillator frequency reduces to approximately 30 kHz in the event of an output short or an overload which causes the regulated output
voltage to drop approximately 40% from the nominal output voltage. This self protection feature lowers the average dissipation of the IC by
lowering the minimum duty cycle from 5% down to approximately 2%.
3. No diode, inductor or capacitor connected to output (Pin 8) sourcing the current.
4. Feedback (Pin 4) removed from output and connected to 0 V.
5. Feedback (Pin 4) removed from output and connected to +12 V to force the output transistor “off”.
6. V in = 40 V.
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