LTC3251EMSE Linear Technology, LTC3251EMSE Datasheet - Page 6

• Manufacturer Part Number: LTC3251EMSE
• Description: IC CONV DC/DC SDOWN HIEFF 10MSOP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck), Switched Capacitor (Charge Pump)r

Specifications of LTC3251EMSE

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 0.9 ~ 1.6 V
• Current - Output: 500mA
• Frequency - Switching: 1MHz ~ 1.6MHz
• Voltage - Input: 2.7 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP Exposed Pad, 10-HMSOP, 10-eMSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -
• Other names: LTC3251EMS; LTC3251EMS

LTC3251/
LTC3251-1.2/LTC3251-1.5
PI FU CTIO S
MD0 (Pin 1)/MD1 (Pin 9): Switching Mode Input Pins. The
Mode input pins are used to set the operating mode of the
LTC3251. The modes of operation are:
MD0 and MD1 are high impedance CMOS inputs and must
not be allowed to float.
V
between 2.7V and 5.5V. Bypass V
ceramic capacitor to GND (C
C1
C1
6
IN
+
–
U
(Pin 2): Input Supply Voltage. Operating V
(Pin 3): Flying Capacitor 1 Positive Terminal (C1).
(Pin 4): Flying Capacitor 1 Negative Terminal (C1).
MD1
0
0
1
1
U
MD0
U
0
1
0
1
OUT
OPERATING MODE
Shutdown
Spread Spectrum with Burst
Continuous Spread Spectrum
Super Burst
).
IN
with a ≥ 1µF low ESR
IN
may be
GND (Pin 5, 11): Ground. Connect to a ground plane for
best performance.
C2
V
nected from V
low ESR ceramic capacitor to GND (C
Capacitor Selection for capacitor size requirements.
C2
FB (Pin 10) (LTC3251): Feedback Input Pin. An output
divider should be connected from V
the output voltage.
MODE (Pin 10) (LTC3251-1.2/LTC3251-1.5): Spread
Spectrum Operation Mode Pin. A low voltage on MODE
enables spread spectrum operation. When MODE is high
spread spectrum operation is disabled and switching
occurs at the maximum operating frequency.
OUT
–
+
(Pin 6): Flying Capacitor 2 Negative Terminal (C2).
(Pin 8): Flying Capacitor 2 Positive Terminal (C2).
(Pin 7): Regulated Output Voltage. V
IN
during shutdown. Bypass V
OUT
to FB to program
IN
OUT
). See V
OUT
is discon-
32511215fb
with a
OUT