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MAX1993ETG Datasheet(PDF) 9 Page - Maxim Integrated Products

Part # MAX1993ETG
Description  Quick-PWM Step-Down Controllers with Inductor Saturation Protection and Dynamic Output Voltages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1993ETG Datasheet(HTML) 9 Page - Maxim Integrated Products

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Quick-PWM Step-Down Controllers with Inductor
Saturation Protection and Dynamic Output Voltages
_______________________________________________________________________________________
9
ILIM SATURATION FAULT CURRENT
vs. ILIM VOLTAGE
VILIM (V)
1.6
1.2
0.8
0.4
1
2
3
4
5
6
7
0
02.0
STARTUP WAVEFORMS
(HEAVY LOAD)
MAX1992 toc14
400
µs/div
2A
5V
0
B
A
D
C
0
0
5V
2V
4A
0
A. SHDN = 0 TO 5V; 5V/div
B. INDUCTOR CURRENT: 2A/div
C. OUTPUT VOLTAGE (VOUT): 2V/div
D. PGOOD: 5V/div, 0.7
Ω LOAD
STARTUP WAVEFORMS
(LIGHT LOAD)
MAX1992 toc15
200
µs/div
2A
5V
3V
B
A
D
C
0
0
0
0
A. SHDN = 0 TO 5V; 5V/div
B. INDUCTOR CURRENT: 2A/div
C. OUTPUT VOLTAGE (VOUT): 2V/div
D. PGOOD: 5V/div, 100
Ω LOAD
SHUTDOWN WAVEFORMS
(DISCHARGE MODE DISABLED)
MAX1992 toc16
20ms/div
B
A
E
C
A. SHDN = 5V TO 0; 5V/div
B. INDUCTOR CURRENT: 2A/div
C. DL: 5V/div
D. OUTPUT VOLTAGE (VOUT): 2V/div
E. PGOOD: 5V/div, 100
Ω LOAD, OVP/UVP = OPEN OR G
D
SHUTDOWN WAVEFORMS
(DISCHARGE MODE ENABLED)
MAX1992 toc17
1.0ms/div
B
A
E
C
A. SHDN = 5V TO 0; 5V/div
B. INDUCTOR CURRENT: 2A/div
C. DL: 5V/div
D. OUTPUT VOLTAGE (VOUT): 2V/div
E. PGOOD: 5V/div, 100
Ω LOAD, OVP/UVP = VCC OR REF
D
5V
5V
0
0
5V
2.5V
0
0
LOAD TRANSIENT
(FORCED-PWM OPERATION)
MAX1992 toc18
20
µs/div
B
A
C
A. LOAD: IOUT = 0.2A TO 4A; 5A/div
B. 2.5V OUTPUT: 100mV/div
C. INDUCTOR CURRENT: 5A/div
D. LX: 10V/div, SKIP = VCC
D
2.5V
4A
2.4V
0
0
5A
2.6V
0
12V
Typical Operating Characteristics (continued)
(MAX1992 Circuit of Figure 1, MAX1993 Circuit of Figure 9, VIN = 12V, VDD = VCC = 5V, SKIP = VCC, TON = open, TA = +25°C,
unless otherwise noted.)


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