MAX1638EAG+ Maxim Integrated Products, MAX1638EAG+ Datasheet - Page 4

• Manufacturer Part Number: MAX1638EAG+
• Description: IC STEP-DWN CTRLR HI-SPD 24-SSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX1638EAG+

• Applications: Controller, Intel Pentium® II
• Voltage - Input: 4.5 ~ 5.5 V
• Number Of Outputs: 1
• Voltage - Output: 1.3 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-SSOP
• Output Voltage: 1.3 V to 5.5 V
• Output Current: 35 A
• Input Voltage: 4.5 V to 5.5 V
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

High-Speed Step-Down Controller with
Synchronous Rectification for CPU Power
ELECTRICAL CHARACTERISTICS
(V
4
Note 1: FB accuracy is 100% tested at FB = 3.5V (code 10000) with V
Note 2: AC load regulation sets the AC loop gain, to make tradeoffs between output filter capacitor size and transient response,
Note 3: Specifications from 0°C to -40°C are guaranteed by design, not production tested.
Input Voltage Range
Input Undervoltage Lockout
V
V
Reference Voltage
Output Voltage (FB) Accuracy
PWROK Trip Level
Switching Frequency
Maximum Duty Cycle
DH On-Resistance
DL On-Resistance
Current-Limit Trip Voltage
DD
CC
DD
_______________________________________________________________________________________
= V
Supply Current
Supply Current
CC
other DAC codes are tested with V
and has only a slight effect on DC accuracy or DC load-regulation error.
PARAMETER
= D4 = +5V, PGND = AGND = D0–D3= 0V, FREQ = REF, T
V
V
V
FB overdrive =
200mV
V
regulation point, operating or shutdown mode
No load
Over line and load (Note 1)
Rising FB, 1% hysteresis with respect to V
Falling FB, 1% hysteresis with respect to V
FREQ = V
FREQ = REF
FREQ = AGND
FREQ = V
BST - LX = 4.5V
V
FB = 3.5V
CC
CC
CC
CC
DD
= V
= V
rising edge, 1% hysteresis
= V
= 4.5V
CC
DD
DD
DD
= V
CC
CC
= 5.5V,
= 5.5V, FB forced 200mV above
DD
= 5V and CSH - CSL = 0.
CONDITIONS
Operating mode
Shutdown
mode
CC
A
= -40°C to +85°C, unless otherwise noted.) (Note 3)
DAC code = 11111
V
= V
REF
DD
= 0V
REF
REF
= 4.5V to 5.5V and CSH - CSL = 0mV to 80mV. The
3.448
MIN
800
510
240
4.5
3.9
84
70
-8
6
1000
TYP
600
300
100
3.5
0.7
0.7
90
-6
8
3.553
MAX
1200
±2.5
690
360
130
5.5
4.3
0.4
0.2
12
10
-4
3
2
2
UNITS
kHz
mA
mA
mV
%
%
%
Ω
Ω
V
V
V
V