MAX1953EUB+ Maxim Integrated Products, MAX1953EUB+ Datasheet - Page 3

• Manufacturer Part Number: MAX1953EUB+
• Description: IC CNTRLR PWM BUCK 10-UMAX
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck)r

Specifications of MAX1953EUB+

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.8 ~ 4.73 V
• Current - Output: 10A
• Frequency - Switching: 1MHz
• Voltage - Input: 3 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Power - Output: 444mW
• Output Voltage: 0.8 V
• Input Voltage: 3 V to 5.5 V
• Supply Current: 1 mA
• Switching Frequency: 1 MHz
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Duty Cycle (max): 89 %
• Output Current: 4000 mA
• Mounting Style: SMD/SMT
• Synchronous Pin: No
• Topology: Boost, Buck
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ELECTRICAL CHARACTERISTICS (continued)
(V
Note 1: Specifications to -40°C are guaranteed by design and not production tested.
Note 2: HSD and IN are externally connected for applications where V
ILIM Input Impedance
Current-Limit Threshold
OSCILLATOR
Switching Frequency
Maximum Duty Cycle
Minimum Duty Cycle
SOFT-START
Soft-Start Period
FET DRIVERS
DH On-Resistance, High State
DH On-Resistance, Low State
DL On-Resistance, High State
DL On-Resistance, Low State
LX, BST Leakage Current
LX, BST, HSD Leakage Current
THERMAL PROTECTION
Thermal Shutdown
Thermal Shutdown Hysteresis
SHUTDOWN CONTROL
COMP Logic Level Low
COMP Logic Level High
COMP Pullup Current
IN
Low-Cost, High-Frequency, Current-Mode PWM
= 5V, V
BST
- V
PARAMETER
LX
_______________________________________________________________________________________
= 5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
MAX1953 only
V
V
V
V
MAX1953
MAX1954/MAX1957
Measured at DH
MAX1953, measured at DH
MAX1954/MAX1957, measured at DH
MAX1953
MAX1954/MAX1957
V
MAX1953/MAX1957
V
V
Rising temperature
3V < V
3V < V
PGND
PGND
PGND
PGND
BST
BST
HSD
= 10.5V, V
= 18.7V, V
= 13.2V (MAX1954 only)
IN
IN
- V
- V
- V
– V
< 5.5V
< 5.5V
LX
LX
LX
LX
, ILIM = GND (MAX1953 only)
, ILIM = open (MAX1953 only)
, ILIM = IN (MAX1953 only)
(MAX1954/MAX1957 only)
CONDITIONS
LX
LX
= V
= 13.2V, V
HSD
IN
= 5.5V,
< 5.5V.
IN
= 5.5V
Buck Controller
A
MIN
= +25°C.) (Note 1)
190
290
190
240
0.8
0.8
50
85
86
TYP
125
105
210
320
210
300
160
4.5
1.5
0.8
89
15
3.4
15
1
2
2
4
MAX
0.25
200
125
235
350
235
360
100
1.2
5.5
96
18
20
30
3
3
3
2
UNITS
MHz
kHz
mV
k
ms
µA
µA
µA
%
%
V
V
C
C
3