Datasheet MAX1684, MAX1685 (Maxim) - 6
| 制造商 | Maxim |
| 描述 | Low-Noise, 14V Input, 1A, PWM Step-Down Converters |
| 页数 / 页 | 14 / 6 — Low-Noise, 14V Input, 1A, PWM Step-Down Converters. Typical Operating … |
| 文件格式/大小 | PDF / 301 Kb |
| 文件语言 | 英语 |
Low-Noise, 14V Input, 1A, PWM Step-Down Converters. Typical Operating Characteristics (continued). MAXIMUM LOAD CURRENT
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Low-Noise, 14V Input, 1A, PWM Step-Down Converters Typical Operating Characteristics (continued)
(Circuit of Figure 1, TA = +25°C, unless otherwise noted.)
MAXIMUM LOAD CURRENT vs. INPUT VOLTAGE SAFE OPERATING AREA DROPOUT VOLTAGE vs. LOAD CURRENT
1.8 1400 400 VOUT = 3.3V 1.7 1200 MAX1684/85 toc11 MAX1684/85 toc12 1.6 MAX1684/85 toc10 300 1000 1.5 800 VOUT = 3.3V 1.4 200 600 1.3 VOUT = 5V LOAD CURRENT (A) LOAD CURRENT (mA) 400 DROPOUT VOLTAGE (mV) 1.2 100 1.1 200 PWM OR NORMAL MODE INDUCTOR RESISTANCE INCLUDED 1.0 0 0 0 2 4 6 8 10 12 14 0 2 4 6 8 10 12 14 16 0 200 400 600 800 1000
MAX1684/MAX1685
INPUT VOLTAGE (V) INPUT VOLTAGE (V) LOAD CURRENT (mA)
MAX1684 NO-LOAD SUPPLY CURRENT NO-LOAD SUPPLY CURRENT vs. INPUT VOLTAGE PWM FIXED-FREQUENCY vs. INPUT VOLTAGE (VOUT = 3.3V, PWM MODE) OPERATION AREA
120 5.0 15 14 4.5 100 13 MAX1684 MAX1684/85 toc13 MAX1684/85 toc14 M AX1684/85 toc15 µA) 12 4.0 MAX1685 80 11 NORMAL MODE 3.5 10 60 9 3.0 INPUT VOLTAGE (V) SUPPLY CURRENT ( SUPPLY CURRENT (mA) 8 40 7 LOW-POWER MODE 2.5 6 20 2.0 2.7 4 6 8 10 12 14 4 5 6 7 8 9 10 11 12 0 2 4 6 8 10 12 14 INPUT VOLTAGE (V) INPUT VOLTAGE (V) OUTPUT VOLTAGE (V)
LOAD-TRANSIENT RESPONSE SWITCHING WAVEFORM SWITCHING WAVEFORM
MAX1684/85 toc16 MAX1684/85 toc17 MAX1684/85 toc18 ILOAD VOUT 500mA/div 20mV/div VLX 5V/div VOUT 50mV/div ILX ILX 100mA/div 100mA/div 2ms/div 1µs/div 1µs/div MAX1684, ILOAD = 0.1mA TO 1A, VOUT = 3.3V, VIN = 5V, MAX1684, ILOAD = 100mA, VOUT = 3.3V, VIN = 5V, MAX1684, ILOAD = 100mA, VOUT = 3.3V, VIN = 5V, SYNC/PWM = 3.3V SYNC/PWM = 3.3V SYNC/PWM = 3.3V
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(Circuit of Figure 1, TA = +25°C, unless otherwise noted.)
MAXIMUM LOAD CURRENT vs. INPUT VOLTAGE SAFE OPERATING AREA DROPOUT VOLTAGE vs. LOAD CURRENT
1.8 1400 400 VOUT = 3.3V 1.7 1200 MAX1684/85 toc11 MAX1684/85 toc12 1.6 MAX1684/85 toc10 300 1000 1.5 800 VOUT = 3.3V 1.4 200 600 1.3 VOUT = 5V LOAD CURRENT (A) LOAD CURRENT (mA) 400 DROPOUT VOLTAGE (mV) 1.2 100 1.1 200 PWM OR NORMAL MODE INDUCTOR RESISTANCE INCLUDED 1.0 0 0 0 2 4 6 8 10 12 14 0 2 4 6 8 10 12 14 16 0 200 400 600 800 1000
MAX1684/MAX1685
INPUT VOLTAGE (V) INPUT VOLTAGE (V) LOAD CURRENT (mA)
MAX1684 NO-LOAD SUPPLY CURRENT NO-LOAD SUPPLY CURRENT vs. INPUT VOLTAGE PWM FIXED-FREQUENCY vs. INPUT VOLTAGE (VOUT = 3.3V, PWM MODE) OPERATION AREA
120 5.0 15 14 4.5 100 13 MAX1684 MAX1684/85 toc13 MAX1684/85 toc14 M AX1684/85 toc15 µA) 12 4.0 MAX1685 80 11 NORMAL MODE 3.5 10 60 9 3.0 INPUT VOLTAGE (V) SUPPLY CURRENT ( SUPPLY CURRENT (mA) 8 40 7 LOW-POWER MODE 2.5 6 20 2.0 2.7 4 6 8 10 12 14 4 5 6 7 8 9 10 11 12 0 2 4 6 8 10 12 14 INPUT VOLTAGE (V) INPUT VOLTAGE (V) OUTPUT VOLTAGE (V)
LOAD-TRANSIENT RESPONSE SWITCHING WAVEFORM SWITCHING WAVEFORM
MAX1684/85 toc16 MAX1684/85 toc17 MAX1684/85 toc18 ILOAD VOUT 500mA/div 20mV/div VLX 5V/div VOUT 50mV/div ILX ILX 100mA/div 100mA/div 2ms/div 1µs/div 1µs/div MAX1684, ILOAD = 0.1mA TO 1A, VOUT = 3.3V, VIN = 5V, MAX1684, ILOAD = 100mA, VOUT = 3.3V, VIN = 5V, MAX1684, ILOAD = 100mA, VOUT = 3.3V, VIN = 5V, SYNC/PWM = 3.3V SYNC/PWM = 3.3V SYNC/PWM = 3.3V
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