MAX1638(2005) データシートの表示（PDF） - Maxim Integrated
部品番号
コンポーネント説明
メーカー
MAX1638
(Rev.:2005)
(Rev.:2005)
Maxim Integrated
MAX1638 Datasheet PDF : 16 Pages
| |||
High-Speed Step-Down Controller with
Synchronous Rectification for CPU Power
__________________________________________Typical Operating Characteristics
(TA = +25°C, using the MAX1638 evaluation kit, unless otherwise noted.)
LOAD-TRANSIENT RESPONSE
WITHOUT GLITCHCATCHER (COUT = 880μF)
LOAD-TRANSIENT RESPONSE
WITHOUT GLITCHCATCHER (COUT = 440μF)
LOAD-TRANSIENT RESPONSE
WITH GLITCHCATCHER
A
B
10μs/div
VIN = 5V, VOUT = 2.0V, LOAD = 14A, 3A/μs
A: VOUT, 50mV/div, AC COUPLED
B: INDUCTOR CURRENT, 10A/div
FOLDBACK CURRENT LIMIT
A
A
B
10μs/div
VIN = 5V, VOUT = 2.0V, LOAD = 14A, 3A/μs
A: VOUT, 100mV/div, AC COUPLED
B: INDUCTOR CURRENT, 10A/div
STARTUP WAVEFORMS
A
B
C
D
10μs/div
COUT = 440μF, VIN = 5V, VOUT = 2.0V, LOAD = 14A, 30A/μs
A: VOUT, 100mV/div,
C: NDRV, 5V/div
AC COUPLED
D: INDUCTOR CURRENT,
B: PDRV, 5V/div
10A/div
SWITCHING WAVEFORMS
A
B
A
C
B
B
0
10μs/div
VO = 2.0V NOMINAL
A: VOUT = 0.5V/div
B: INDUCTOR CURRENT, 5A/div
400μs/div
A: VOUT = 0.5V/div
B: INDUCTOR CURRENT, 5A/div
1μs/div
VIN = 5V, VOUT = 2.5V, LOAD = 5A
A: LX, 5V/div
C: INDUCTOR CURRENT,
B: VOUT, 20mV/div, AC COUPLED 5A/div
EFFICIENCY vs. OUTPUT CURRENT
100
VOUT = 3.5V
90
80
70
VOUT = 1.3V
60
VOUT = 2.0V
50
40
30
0.1
1
10
100
OUTPUT CURRENT (A)
REFERENCE VOLTAGE
vs. OUTPUT CURRENT
5.094
4.594
4.094
SINKING
CURRENT
3.594
3.094
2.594
2.094
1.594
SOURCING
CURRENT
1.094
0.001
0.01
0.1
1
10
OUTPUT CURRENT (mA)
100
95
90
85
80
75
70
65
60
55
50
0
MAXIMUM DUTY CYCLE
vs. SWITCHING FREQUENCY
200 400 600 800 1000 1200
SWITCHING FREQUENCY (kHz)
_______________________________________________________________________________________ 5
Share Link: