MAX8834Y 데이터 시트보기 (PDF) - Maxim Integrated
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MAX8834Y Datasheet PDF : 44 Pages
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MAX8834Y/MAX8834Z
Adaptive Step-Up Converters
with 1.5A Flash Driver
ELECTRICAL CHARACTERISTICS (continued)
(VIN = 3.6V, VAGND = VPGND = VFGND = 0V, VDD = 1.8V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at
TA = +25°C.) (Note 1)
PARAMETER
CONDITIONS
Maximum Duty Cycle
Minimum Duty Cycle
COMP Transconductance
COMP Discharge Resistance
VOUT = 4.5V
VOUT = 4.5V
VCOMP = 1.5V
During shutdown or UVLO, from COMP to AGND
OUT Discharge Resistance
During shutdown or UVLO, from OUT to LX
FLED1/FLED2 CURRENT REGULATOR
IN Supply Current
Step-up off, FLED1/FLED2 on, supply current for each
current source
Maximum Current Setting
Flash
Movie
23.44mA setting
TA = +25°C
Current Accuracy
492.24mA setting
TA = +25°C
TA = -40°C to +85°C
750mA setting
TA = -40°C to +85°C
Current Regulator Dropout
(Note 2)
492.24mA setting
93.75mA setting
FLED1/FLED2 Leakage in
Shutdown
VFLED1 = VFLED2 = 5.5V
INDLED CURRENT REGULATOR
TA = +25°C
TA = +85°C
IN Supply Current
Step-up converter off, INDLED on
Maximum Current Setting
Current Accuracy
Current Regulator Dropout
0.5mA setting
16mA setting
16mA setting (Note 2)
TA = +25°C
TA = +25°C
TA = -40°C to +85°C
INDLED Leakage in Shutdown
PROTECTION CIRCUITS
VINDLED = 5.5V
TA = +25°C
TA = +85°C
NTC BIAS Current
NTC Overtemperature Detection
Threshold
VNTC falling, 100mV hysteresis, NTC_CNTL[2:0] = 100
NTC Short Detection Threshold
Flash Duration Timer Range
Flash Duration Timer Accuracy
(400ms Setting)
Minimum Flash Duration
VNTC falling
In 50ms steps (Note 3)
TA = +25°C
TA = -40°C to +85°C
FLASH_EN[2:0] = 1XX
Flash Safety Timer Reset Inhibit From falling edge of LED_EN until flash safety timer is
Period
reset
Watchdog Timer Range
In 4s steps
MIN TYP MAX UNITS
69
75
%
7.5
%
55
µS
120
10
k
0.6
mA
750
mA
125
-5
+20
%
-2.5 ±0.5 +2.5
%
-4
+4
-10
+5
%
110
mV
50
100
-1
0.01
+1
µA
0.1
0.6
mA
16
mA
-10
+10
%
-3
±0.5
+3
%
-5
+5
%
55
130
mV
-1
0.01
+1
µA
0.1
19.4
20
20.6
µA
388 400 412
mV
100
mV
50
800
ms
360 400 440
ms
320
480
2
ms
30
ms
4
16
s
4
Maxim Integrated
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