MAX1649CPA Maxim Integrated Products, MAX1649CPA Datasheet - Page 7

• Manufacturer Part Number: MAX1649CPA
• Description: IC CTRLR DCDC 3V/ADJ LDO 8-DIP
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck)r

Specifications of MAX1649CPA

• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 5V, 1.5 ~ 16 V
• Current - Output: 2.5A
• Frequency - Switching: Up to 350kHz
• Voltage - Input: 3 ~ 16 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Power - Output: 727mW
• Output Voltage: 5 V, 1.5 V to 16 V
• Output Current: 2.5 A
• Input Voltage: 3 V to 16 V
• Mounting Style: Through Hole
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

When SHDN is high, the MAX1649/MAX1651 enter shut-
down mode. In this mode, the internal biasing circuitry is
turned off (including the reference) and the supply cur-
rent drops to less than 5µA. EXT goes high, turning off the
external MOSFET. SHDN is a logic-level input. Connect
SHDN to GND for normal operation.
Figure 2. Block Diagram
Dual Mode is a trademark of Maxim Integrated Products, Inc.
SHDN
REF
Low-Dropout, Step-Down DC-DC Controllers
_______________________________________________________________________________________
5V/3.3V or Adjustable, High-Efficiency,
Q
MAX1649
MAX1651
ONE-SHOT
MINIMUM
OFF-TIME
TRIG
MAXIMUM
ONE-SHOT
ON-TIME
TRIG
Shutdown Mode
Q
COMPARATOR
ERROR
V+
REFERENCE
1.5V
COMPARATOR
In normal operation, the device's typical quiescent cur-
rent is 78µA. In an actual application, even with no load,
additional current is drawn to supply external feedback
resistors (if used) and the diode and capacitor leakage
currents. In the circuit of Figure 1, with V+ at 5V and
V
entire circuit is 90µA.
GND
CURRENT
OUT
S
R
at 3.3V, typical no-load supply current for the
F/F
Q
FB
50mV
110mV
FROM V+
DUAL-MODE™
COMPARATOR
Quiescent Current
N
FROM V+
OUT
EXT
CS
7