MAX1637EEE Maxim Integrated Products, MAX1637EEE Datasheet - Page 6

• Manufacturer Part Number: MAX1637EEE
• Description: IC CTRLR MINI LV STPDWN 16-QSOP
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck)r

Specifications of MAX1637EEE

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 1.1 ~ 5.5 V
• Current - Output: 3A
• Frequency - Switching: Adj to 350kHz
• Voltage - Input: 3.15 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Power - Output: 667mW
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Miniature, Low-Voltage,
Precision Step-Down Controller
(V
6
____________________________________Typical Operating Characteristics (continued)
______________________________________________________________Pin Description
OUT
PIN
10
11
12
13
14
15
16
_______________________________________________________________________________________
1
2
3
4
5
6
7
8
9
= 3.3V, T
NAME
PGND
SHDN
SYNC
GND
CSH
SKIP
CSL
V
REF
V
BST
CC
DH
DL
FB
LX
CC
GG
A
TIME EXITING SHUTDOWN
= +25°C, unless otherwise noted.)
(V
OUT
= 3.3V, I
High-Side Current-Sense Input
Low-Side Current-Sense Input
Feedback Input. Connect to center of resistor divider.
Compensation Pin. Connect a small capacitor to GND to set the integration time constant.
1.100V Reference Output. Capable of sourcing 50µA for external loads. Bypass with 0.22µF minimum.
Shutdown Control Input. Turns off entire IC. When low, reduces supply current below 0.5µA (typ). Drive with
logic input or connect to RC network between GND and V
Oscillator Frequency Select and Synchronization Input. Tie to V
200kHz operation.
Analog Ground
Main Analog Supply-Voltage Input to the Chip. V
range is 3.15V to 5.5V. Bypass to GND with a 0.1µF capacitor close to the pin.
Gate-Drive and Boost-Circuit Power Supply. Can be driven from a supply other than V
is used by both V
capacitor. V
Low-Side Gate-Driver Output
Power Ground
Boost Capacitor Connection
High-Side Gate-Driver Output
Inductor Connection
Low-Noise Mode Control. Forces fixed-frequency PWM operation when high.
500μs/div
LOAD
= 7A)
GG
MAX1637-16
current = (Q
CC
and V
V
1V/div
V
5V/div
OUT
SHDN
GG
G1
, isolate V
+ Q
G2
) x f, where Q
CC
from V
FUNCTION
CC
GG
G
powers the PWM controller, logic, and reference. Input
with a 20Ω resistor. Bypass to PGND with a 4.7µF
is the MOSFET gate charge at V
OVERVOLTAGE-PROTECTION WAVEFORMS
CC
THROUGH A 0.5Ω RESISTOR)
for automatic start-up.
(V
CC
IN
SHORTED TO V
for 300kHz operation; tie to GND for
10μs/div
OUT
MAX1637-17
GS
CC
. If the same supply
= V
V
100mV/div
5V
0V
0A
-5A
-10A
OUT
GG
V
INDUCTOR
CURRENT
DL
.