MAX1577YETA+T Maxim Integrated Products, MAX1577YETA+T Datasheet - Page 5

• Manufacturer Part Number: MAX1577YETA+T
• Description: IC LED DRIVR BCKLGT FLASH 8-TDFN
• Manufacturer: Maxim Integrated Products
• Type: Backlight, Flash, Movier

Specifications of MAX1577YETA+T

• Topology: Linear (LDO), PWM, Switched Capacitor (Charge Pump)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Backlight, Flash/Torch
• Type - Secondary: RGB, White LED
• Frequency: 800kHz ~ 1.25MHz
• Voltage - Supply: 2.7 V ~ 5.5 V
• Voltage - Output: 3.4V, 4.6V, 5.1V
• Mounting Type: Surface Mount
• Package / Case: 8-TDFN Exposed Pad
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 800mA
• Internal Switch(s): Yes
• Efficiency: 92%
• Function: Step Up, Step Down
• Output Voltage: 3.4 V, 4.6 V, 5.1 V
• Output Current: 1200 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 1. Enable, Dimming, Voltage Mode, and Overvoltage Protection
Note:
EN1
0
0
1
1
PIN
A “0” indicates EN_ is logic low or connected to GND. A “1” indicates EN_ is logic high or connected to IN.
—
1
2
3
4
5
6
7
8
1.2A White LED Regulating Charge Pump for
EN2
0
1
0
1
NAME
GND
OUT
EN1
EN2
CN
CP
CS
_______________________________________________________________________________________
EP
IN
DIMMING LEVEL
100% Current
20% Current
33% Current
Shutdown
Control Logic Input (see Table 1)
Transfer Capacitor Positive Connection. Connect a 1µF capacitor (or 2.2µF for I
CP to CN.
Transfer Capacitor Negative Connection. Connect a 1µF capacitor (or 2.2µF for I
CP to CN.
Control Logic Input (see Table 1)
Ground
Input Supply Voltage. Connect IN to a battery or supply voltage from 2.7V to 5.5V. Connect a 4.7µF
ceramic capacitor from IN to GND.
Current-Sense Input. Connect a current-sense resistor from OUT to CS to set the output current.
Connect the anodes of the LEDs to CS and the cathodes to GND.
Output. Connect a 10µF ceramic capacitor from OUT to GND. In shutdown, OUT is pulled to GND
with an internal 5kΩ resistor.
Exposed Pad. Connect the exposed pad to GND directly under the IC.
Camera Flashes and Movie Lights
CS THRESHOLD
(V
OUT
100mV
300mV
60mV
—
- V
CS
)
MAX1577Z
5.10V
5.10V
5.10V
—
VOLTAGE MODE
FUNCTION
MAX1577Y
3.40V
4.60V
5.10V
—
MAX1577Z
Pin Description
5.30V
5.30V
5.30V
—
OUT
OUT
> 600mA) from
OVP
> 600mA) from
MAX1577Y
5.15V
5.17V
5.30V
—
5