MAX1844ETP+ Maxim Integrated Products, MAX1844ETP+ Datasheet - Page 4

• Manufacturer Part Number: MAX1844ETP+
• Description: IC CNTRLR STP DWN HS 20-TQFN
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck)r

Specifications of MAX1844ETP+

• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.8V, 2.5V, Adj
• Current - Output: 4A
• Frequency - Switching: 200kHz, 300kHz, 450kHz, 600kHz
• Voltage - Input: 2 ~ 28 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-TQFN Exposed Pad
• Power - Output: 727mW
• Output Voltage: 1 V to 5.5 V, 1.8 V, 2.5 V
• Output Current: 4000 mA
• Mounting Style: SMD/SMT
• Switching Frequency: 600 KHz
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Synchronous Pin: No
• Topology: Buck
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V+ = 15V, V
T
High-Speed Step-Down Controller with
Accurate Current Limit for Notebook Computers
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V+ = 15V, V
4
DH Gate-Driver On-Resistance
(Note 4)
DH Gate-Driver Source/Sink
Current
DL Gate-Driver Source Current
DL Gate-Driver Sink Current
Dead Time
Logic Input High Voltage
Logic Input Low Voltage
Logic Input Current
Dual Mode Threshold, Low
Dual Mode Threshold, High
TON V
TON Float Voltage
TON Reference Level
TON GND Level
TON Input Current
ILIM Input Leakage Current
DL Gate-Driver On-Resistance
(Note 4)
DL Gate-Driver On-Resistance
(Note 4)
A
Input Voltage Range
Error Comparator Threshold
(DC Output Voltage Accuracy)
(Note 1)
On-Time
= +25°C.)
_______________________________________________________________________________________
CC
Level
PARAMETER
PARAMETER
CC
CC
= V
BST - LX forced to 5V
DH forced to 2.5V, BST-LX forced to 5V
DL forced to 2.5V
DL forced to 5V
DL rising
DH rising
LATCH, SHDN, SKIP
LATCH, SHDN, SKIP
LATCH, SHDN, SKIP
OVP, UVP, FB
OVP, UVP
FB
Forced to GND or V
= V
Battery voltage, V+
V
V+ = 4.5V to 28V,
SKIP = V
V+ = 24V,
V
(Note 2)
DL, high state
DL, low state
DD
CC
OUT
DD
= 5V, SKIP = GND, T
, V
= 2V
= 5V, SKIP = GND, T
DD
CC
CC
CONDITIONS
CONDITIONS
FB = OUT
FB = GND
FB = V
TON = GND
TON = REF(450kHz)
TON = Unconnected (300kHz)
TON = V
MAX1844EEP
MAX1844EGP, MAX1844ETP
MAX1844EEP
MAX1844EGP, MAX1844ETP
MAX1844EEP
MAX1844EGP, MAX1844ETP
A
= -40°C to +85°C, unless otherwise noted.) (Note 3)
A
CC
= 0°C to +85°C, unless otherwise noted. Typical values are at
CC
(200kHz)
(600kHz)
V
V
CC
CC
0.15
3.15
1.65
-100
MIN
2.4
1.9
0.985
2.462
1.773
-1
-3
MIN
140
175
260
380
4.5
- 1.5
- 0.4
2
TYP
0.20
TYP
1.5
1.5
1.5
1.5
0.5
0.5
2.0
35
26
1
1
3
0
V
CC
1.015
2.538
1.827
MAX
+100
180
225
320
470
MAX
5.5
0.25
3.85
2.35
28
1.7
2.7
0.8
2.1
0.5
+1
+3
5
6
5
6
- 0.4
UNITS
UNITS
µA
µA
nA
ns
ns
V
V
Ω
Ω
Ω
A
A
A
V
V
V
V
V
V
V
V