MAX1945SEUI Maxim Integrated Products, MAX1945SEUI Datasheet - Page 5

• Manufacturer Part Number: MAX1945SEUI
• Description: DC/DC Switching Regulators 1MHz 1% 6A Step-Down PWM
• Manufacturer: Maxim Integrated Products

Specifications of MAX1945SEUI

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

ELECTRICAL CHARACTERISTICS (continued)
(V
otherwise noted. Typical values are at +25°C.)
ELECTRICAL CHARACTERISTICS
(V
otherwise noted.) (Note 2)
IN/V
Input Voltage
IN Supply Current
V
V
Total Shutdown Current from IN,
V
V
Threshold
V
V
BST
BST Shutdown Supply Current
REF
REF Voltage
REF Shutdown Resistance
COMP
COMP Transconductance
COMP Clamp Voltage Low
COMP Clamp Voltage High
COMP Shutdown Resistance
THERMAL SHUTDOWN
Thermal-Shutdown Hysteresis
Thermal-Shutdown Threshold
IN
IN
CC
DD
CC
CC
DD
DD
= V
= V
, and V
CC
Supply Current
Supply Current
Undervoltage Lockout
Shutdown Supply Current
CC
CC
PARAMETER
PARAMETER
= V
= V
DD
CTL1
CTL1
= V
= V
_______________________________________________________________________________________
1MHz, 1% Accurate, 6A Internal Switch
CTL2
CTL2
= V
= V
DD
DD
= 3.3V, SYNC = GND, FBSEL = High-Z, V
= 3.3V, SYNC = GND, FBSEL = High-Z, V
SYMBOL
SYMBOL
V
I
V
V
CLAMP
CLAMP
TOTAL
V
I
HIGH_
I
UVLO
LOW_
I
I
V
VDD
BST
I
CC
DD
REF
IN
IN
SYNC = V
no load
SYNC = V
SYNC = V
V
CTL1 = CTL2 = GND
When LX starts/stops
switching
V
CTL1 = CTL2 = GND
V
CTL1 = CTL2 = GND
I
From REF to GND, CTL1 = CTL2 = GND
From FB to COMP,
V
V
V
From COMP to GND, CTL1 = CTL2 = GND
When LX stops switching
REF
IN
IN
IN
COMP
IN
IN
= V
= V
= V
= 2.6V to 5.5V, V
= 2.6V to 5.5V, V
= 0, V
CC
DD
DD
= 1.25V
CC
CC
CC
= V
= V
= V
IN
= 2.6V to 5.5V
(1MHz),
(1MHz)
(1MHz)
BST
BST
DD
CONDITIONS
CONDITIONS
= V
= 5.5V, V
= 5.5V, V
FB
FB
BST
Step-Down Regulators
= 0.9V
= 0.7V
- V
LX
LX
FBSEL = High-Z
FBSEL = GND
FBSEL = V
LX
FB
FB
V
V
V
V
V
= 5.5V or 0,
= 5.5V or 0,
= 5.5V,
= 0.7V, C
IN
CC
DD
CC
CC
= 0.7V, C
= 3.3V
= 3.3V
= 3.3V
rising
falling
CC
REF
REF
= 0.22µF, T
= 0.22µF, T
2.20
1.96
13.3
1.90
MIN
MIN
2.6
9.6
0.5
30
A
TYP
TYP
165
A
20
= -40°C to +85°C, unless
= 0°C to +85°C, unless
MAX
MAX
2.55
2.04
37.8
27.2
2.40
500
100
100
5.5
1.1
20
10
10
85
4
8
UNITS
UNITS
mA
mA
mA
µA
µA
µA
µS
°C
°C
Ω
Ω
V
V
V
V
V
5