MAX1637EEE Maxim Integrated Products, MAX1637EEE Datasheet - Page 9

• 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

The pulse-width-modulation (PWM) controller consists
of a multi-input PWM comparator, high-side and low-
side gate drivers, and logic. It uses a 200kHz/300kHz
synchronizable oscillator. The MAX1637 contains fault-
protection circuits that monitor the PWM output for
undervoltage and overvoltage. It includes a 1.100V pre-
Figure 2. Functional Diagram
SHDN
REF
V
REF
SHUTDOWN
-30%
CONTROL
_______________________________________________________________________________________
OFF
UNDER-
VOLTAGE
FAULT
-
OVERVOLTAGE
1.1V
REF.
V
REF
FAULT
V
BIAS
+7%
3.15V TO 5.5V
V
-
POWER
CC
IC
SLOPE
COMPENSATION
200kHz
300kHz
OSC
TO
REF
Precision Step-Down Controller
SYNC
GND
LOGIC
PWM
LP FILTER
60kHz
gm
SKIP
-
ERROR
INTEGRATOR
MAX1637
REF
Miniature, Low-Voltage,
+
-
cision reference. The circuit blocks are powered from
an internal IC power rail that receives power from V
V
gate driver, but provides indirect power to the high-
side-switch gate driver via an external diode-capacitor
boost circuit.
GG
FB
V
BST
DH
LX
DL
PGND
CSH
CSL
CC
provides direct power to the synchronous-switch
GG
V
BATT
+
V
+
OUT
CC
9
.