MAX4845ELT+T Maxim Integrated Products, MAX4845ELT+T Datasheet - Page 4

• Manufacturer Part Number: MAX4845ELT+T
• Description: IC CTLR OVP 5.8V 6-UDFN
• Manufacturer: Maxim Integrated Products
• Type: Overvoltage Protection Controllerr

Specifications of MAX4845ELT+T

• Applications: Cell Phones, Digital Cameras, Media Players
• Mounting Type: Surface Mount
• Package / Case: 6-µDFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: MAX4845ELT+T; MAX4845ELT+TTR

Overvoltage Protection Controllers with
Low Standby Current
(V
V
4
V
FLAG
OUT
10
V
IN
I
8
6
4
2
0
IN
IN
μDFN
_______________________________________________________________________________________
5, 6
= +5V for MAX4843/MAX4844/MAX4845, V
1
1
2
3
4
GATE VOLTAGE vs. INPUT VOLTAGE
PIN
2
POWER-UP RESPONSE
THIN LGA
ULTRA-
INPUT VOLTAGE (V)
(MAX4846)
5, 6
3
1
2
3
4
20ms/DIV
4
NAME
GATE
FLAG
GND
N.C.
IN
MAX4843-46 toc07
5
Voltage Input. IN is both the power-supply input and the overvoltage sense input. Bypass IN
to GND with a 1μF capacitor or larger.
Ground
Fault Indication Output. FLAG is asserted high during undervoltage lockout and overvoltage
lockout conditions. FLAG is deasserted during normal operation. FLAG is an open-drain
output.
Gate-Drive Output. GATE is the output of an on-chip charge pump. When V
GATE is driven high to turn on the external n-channel MOSFET(s).
No Connection. Not internally connected. Do not connect.
6
0
0
0
0
5V/DIV
5V/DIV
5V/DIV
1A/DIV
10.50
10.25
10.00
V
V
9.75
9.50
I
IN
GATE
FLAG
GATE
V
Typical Operating Characteristics (continued)
IN
= +4V for MAX4846, T
3
GATE VOLTAGE vs. INPUT VOLTAGE
OVERVOLTAGE RESPONSE
4
GATE CURRENT = 0
INPUT VOLTAGE (V)
(MAX4843)
5
4μs/DIV
GATE
CURRENT = 1μA
6
A
= +25°C, unless otherwise noted.)
MAX4843-46 toc08
7
FUNCTION
8
8V
0
0
0
0
5V/DIV
10V/DIV
10mA/DIV
5V/DIV
V
V
V
V
GATE
FLAG
FLAG
GATE
V
V
IN
IN
POWER-UP OVERVOLTAGE RESPONSE
Pin Description
POWER-UP RESPONSE
UVLO
20ms/DIV
20μs/DIV
< V
IN
< V
MAX4843-46 toc06
MAX4843-46 toc09
OVLO
,
0
0
0
8V
0
0
0
5V/DIV
5V/DIV
5V/DIV
5V/DIV
2V/DIV
5V/DIV