MAX8645YETI+ Maxim Integrated Products, MAX8645YETI+ Datasheet - Page 13

• 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

The MAX8645X/MAX8645Y are high-frequency,
switched-capacitor voltage regulators. For best circuit
performance, use a solid ground plane and place C
C
should be no vias on C
the exposed paddle directly under the IC. Refer to the
MAX8645Y evaluation kit for an example.
For the latest package outline information and land patterns, go
to www.maxim-ic.com/packages.
Table 3. Recommended Components for Figure 2
PROCESS: BiCMOS
OUT
DESIGNATION
PACKAGE TYPE
C3, C4, C6, C7
R
D5 (D5–D8)
SETM
28 TDFN-EP
C1, C5
D1–D4
, C3, and C4 as close as possible to the IC. There
C8
, R
SETF
______________________________________________________________________________________
required
VALUE
0.01µF
PACKAGE CODE
10µF
1x/1.5x/2x White LED Charge Pump with
1µF
As
Package Information
—
—
IN
PCB Layout and Routing
T2844-1
. Connect GND and PGND to
Chip Information
MANUFACTURER
Panasonic
Vishay
Nichia
Nichia
TDK
TDK
TDK
DOCUMENT NO.
Two LDOs in 4mm x 4mm TQFN
21-0139
C2012X5R0J106M
C1005X5R0J105M
C1005X7R1E103K
NBCW011T
NSCW215T
IN
PART
,
—
TOP VIEW
PGND
C1P
10µF ±20%, 6.3V X5R ceramic capacitors (0805)
1µF ±20%, 6.3V X5R ceramic capacitors (0402)
0.01µF ±10%, 25V X7R ceramic capacitor (0402)
White LEDs
White LEDs, 4 LEDs in one package
1% resistors
P1
23
25
26
27
28
22
24
(4mm x 4mm, 0.4mm LEAD PITCH)
21
1
20
2
19
3
THIN QFN
MAX8645X
MAX8645Y
DESCRIPTION
18
4
Pin Configuration
17
5
16
6
15
7
14
13
12
11
10
9
8
M3
M4
M5
M6
F1
F2
SETM
13