MAX8645YETI+ Maxim Integrated Products, MAX8645YETI+ Datasheet - Page 2

IC LED DRVR WHITE BCKLGT 28-TQFN

MAX8645YETI+

Manufacturer Part Number
MAX8645YETI+
Description
IC LED DRVR WHITE BCKLGT 28-TQFN
Manufacturer
Maxim Integrated Products
Type
Backlight, White LEDr
Datasheet

Specifications of MAX8645YETI+

Constant Current
Yes
Topology
Linear (LDO), Switched Capacitor (Charge Pump)
Number Of Outputs
8
Internal Driver
Yes
Type - Primary
Backlight
Type - Secondary
White LED
Frequency
1MHz
Voltage - Supply
2.7 V ~ 5.5 V
Voltage - Output
5.5V
Mounting Type
Surface Mount
Package / Case
28-TQFN Exposed Pad
Operating Temperature
-40°C ~ 85°C
Current - Output / Channel
200mA
Internal Switch(s)
Yes
Efficiency
85%
Number Of Segments
8
Low Level Output Current
400000 uA (Typ)
Operating Supply Voltage
2.7 V to 5.5 V
Maximum Supply Current
5.5 mA
Maximum Power Dissipation
1666 mW
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Led Driver Application
Backlighting And Flash, Digital Cameras And Camcorders
No. Of Outputs
8
Output Current
200mA
Output Voltage
5.5V
Input Voltage
2.7V To 5.5V
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
ABSOLUTE MAXIMUM RATINGS
PIN, IN, OUT, REFBP to GND................................-0.3V to +6.0V
SETF, SETM, ENLDO, ENM1, ENM2, ENF,
M1, M2, M3, M4, M5, M6, F1,
C1N, C2N to GND ......................................... -0.3V to (V
C1P, C2P
PGND to GND .......................................................-0.3V to +0.3V
1x/1.5x/2x White LED Charge Pumps with Two
LDOs in 4mm x 4mm TQFN
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
T
2
IN Operating Voltage
Undervoltage-Lockout Threshold
Undervoltage-Lockout Hysteresis
Supply Current
Shutdown Supply Current
EN_ High Voltage
EN_ Low Voltage
EN_ Input Current
ENM_ or ENF Low Shutdown
Delay t
ENM_ or ENF t
ENM_ or ENF t
Initial ENM_ or ENF t
P1, P2 Shutdown Input Current
P1, P2 Input Impedance
Thermal-Shutdown Threshold
Thermal-Shutdown Hysteresis
CHARGE PUMP
Overvoltage-Protection Threshold
Soft-Start Time
A
P1, P2, LDO1, LDO2 to GND....................-0.3V to (V
IN
F2 to GND.............................................-0.3V to (V
to GND........ -0.3V to the greater of (V
= -40°C to +85°C, unless otherwise noted. Typical values are at T
_______________________________________________________________________________________
= 3.6V, V
SHDN
PARAMETER
GND
LO
HI
= V
HI
PGND
= 0V, ENM1 = ENM2 = ENF = IN, R
V
1MHz switching, no load, 1.5x or 2x mode
1x mode 10% setting, ENF = GND, V
I
ENM1 = ENM2 = ENF = GND, V
I
ENM1 = ENM2 = ENF = ENLDO = GND
V
V
V
See Figure 1
See Figure 1
See Figure 1
Only required for first ENM_ or ENF pulse; see Figure 1
Temperature rising
V
LDO1
LDO1
IN
IN
IN
EN_
OUT
OUT
= 2.7V to 5.5V
rising or falling
= 2.7V to 5.5V
= 0V or 5.5V
rising
= I
= I
+ 1V) or (V
LDO2
LDO2
OUT
= 0A
= 0A
IN
IN
IN
+ 0.3V)
+ 0.3V)
+ 1V)
+ 1V)
CONDITIONS
SETM
A
ENLDO
OUT, LDO1, LDO2 Short Circuit to GND ...................Continuous
Continuous Power Dissipation (T
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
= +25°C.) (Note 1)
28-Pin TQFN 4mm x 4mm
(derate 20.8mW/°C above +70°C) .............................1666mW
= R
ENLDO
= V
SETF
IN
T
T
T
T
= V
A
A
A
A
,
= 6.8kΩ, P1 = P2 = unconnected, C
= +25°C
= +85°C
= +25°C
= +85°C
IN
,
MIN
2.25
200
2.7
1.4
2.5
0.5
0.5
A
= +70°C)
+160
TYP
2.45
0.01
0.01
130
110
150
4.0
0.4
0.1
0.1
20
1
5
2
250.0
MAX
2.60
5.5
5.5
0.4
5
1
REF
= 0.01µF,
UNITS
mV
mA
ms
ms
µA
µA
µA
µA
°C
°C
µs
µs
µs
V
V
V
V
V

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