MAX8645YETI+ Maxim Integrated Products, MAX8645YETI+ Datasheet - Page 4

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

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

ELECTRICAL CHARACTERISTICS (continued)
(V
T
1x/1.5x/2x White LED Charge Pumps with
Two LDOs in 4mm x 4mm TQFN
Note 1: All devices are 100% production tested at T
Note 2: LED dropout voltage is defined as the M_ or F_ to GND voltage at which current into M_ or F_ drops 10% from the value at
Note 3: (Greater of 2.7V or (V
Note 4: LDO dropout voltage is defined as V
4
(V
Soft-Start Done Time
Dropout Voltage
Load Regulation
Power-Supply Rejection
ΔV
Output Noise Voltage (RMS)
A
IN
IN
= -40°C to +85°C, unless otherwise noted. Typical values are at T
OUT
100
_______________________________________________________________________________________
= 3.6V, V
= V
90
80
70
60
50
40
2.7
/ΔV
design.
M_ or F_ = 0.2V.
V
EN_
OUT(NOM)
VOLTAGE DRIVING SIX MAIN LEDs
PARAMETER
IN
EFFICIENCY vs. Li+ BATTERY
= 3.6V, circuit of Figure 2, T
3.0
GND
Li+ BATTERY VOLTAGE (V)
1.5mA/LED
= V
+ 1V. Since the minimum input voltage is 2.7V, this specification is only meaningful when V
3.3
4.5mA/LED
PGND
3.6
= 0V, ENM1 = ENM2 = ENF = IN, R
15mA/LED
LDO_
3.9
+ 0.5V)) ≤ V
I
V
10Hz to 10kHz, C
10Hz to 100kHz, C
LDO_
IN
4.2
A
= 3.7V, 100µA < I
= +25°C, unless otherwise noted.)
= 200mA (Note 4)
IN
IN
- V
100
90
80
70
60
50
40
≤ 5.5V.
OUT
2.7
A
VOLTAGE DRIVING FLASH LED MODULE
400mA TOTAL
= +25°C. Limits over the operating temperature range are guaranteed by
LDO_
160mA TOTAL
80mA TOTAL
when V
LDO_
EFFICIENCY vs. Li+ BATTERY
LDO_
3.0
CONDITIONS
= 1µF, I
Li+ BATTERY VOLTAGE (V)
= 1µF, I
OUT
< 200mA
3.3
is 100mV below the value of V
SETM
LDO_
A
LDO_
= +25°C.) (Note 1)
Typical Operating Characteristics
3.6
= R
= 10µA
= 10mA
SETF
3.9
= 6.8kΩ, P1 = P2 = unconnected, C
4.2
180
150
120
90
60
30
0
OUT
BATTERY CURRENT vs. SUPPLY VOLTAGE
2.7
MIN
I
LED
I
LED
measured when V
= 15mA
= 4.5mA
3.0
DRIVING SIX MAIN LEDs
TYP
SUPPLY VOLTAGE (V)
100
120
-60
40
3.3
OUT(NOM)
MAX
3.6
320
1.3
I
LED
REF
IN
V
V
> 2.5V.
IN
IN
=
= 1.5mA
FALLING
RISING
= 0.01µF,
3.9
UNITS
µV
mV
dB
µs
%
RMS
4.2