MAX1760EUB+T Maxim Integrated Products, MAX1760EUB+T Datasheet - Page 6

• Manufacturer Part Number: MAX1760EUB+T
• Description: IC DC-DC CONV STP UP 10-UMAX
• Manufacturer: Maxim Integrated Products
• Type: Step-Up (Boost)r

Specifications of MAX1760EUB+T

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 3.3V, 2.5 ~ 5.5 V
• Current - Output: 800mA
• Frequency - Switching: 1MHz
• Voltage - Input: 0.7 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Power - Output: 444mW
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

0.8A, Low-Noise, 1MHz,
Step-Up DC-DC Converter
(Circuit of Figure 2, V
6
PIN
10
—
1
2
3
4
5
6
7
8
9
_______________________________________________________________________________________
16
12
8
4
0
0.1
CLK/SEL
NAME
PGND
POUT
GND
OUT
ISET
REF
ON
ON
FB
EP
LX
NOISE SPECTRUM
FREQUENCY (MHz)
IN
Exposed Paddle (TDFN Package Only). Internally connected to GND. Connect to a large ground plane to
maximize thermal dissipation. Do not use as sole ground connection.
N-Channel Current-Limit Control. For maximum current limit, connect to REF. To reduce current, supply a
voltage between REF and GND by means of a resistive voltage-divider. If soft-start is desired, connect a
capacitor from ISET to GND. When ON = high, or V
resistor discharges this pin to GND.
1.250V Voltage Reference Bypass. Connect a 0.22µF ceramic bypass capacitor to GND. Up to 50µA of
external load current is allowed.
Ground. Connect to PGND with short trace.
DC-DC Converter Feedback Input. To set fixed output voltage of +3.3V, connect FB to ground. For
adjustable output of 2.5V to 5.5V, connect to a resistive divider from OUT to GND. FB set point = 1.24V.
IC Power, Supplied from the Output. Bypass to GND with a 0.68µF ceramic capacitor, and connect to POUT
with a series 4.7 resistor (Figure 2).
Clock Input for the DC-DC Converter. Also serves to program operating mode of switcher as follows:
CLK/SEL = LO: Normal operation—operates at a fixed frequency, automatically switching to low-power
mode if load is minimized.
CLK/SEL = HI: Forced-PWM mode—operates in low-noise, constant-frequency mode at all loads.
CLK/SEL = Clocked: Forced-PWM mode with the internal oscillator synchronized to CLK in 500kHz to
1200kHz range.
Source of N-Channel Power MOSFET Switch
Inductor Connection
Power Output. P-channel synchronous-rectifier source.
MAX1760 Enable Input. When ON is low, the IC is on. Connect to GND for normal operation.
MAX1760H Enable Input. When ON is high, the IC is on. Connect to OUT for normal operation.
= 2.4V, V
1
OUT
10
= 3.3V, T
A
= +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
OV
A
B
C
NO SOFT-START COMPONENTS
A = ON, 5V/div
B = INPUT CURRENT, 500mA/div
C = V
TURN-ON WAVEFORMS
OUT
, 2V/div
t = 2ms/div
FUNCTION
REF
<80% of nominal value, an on-chip 100k switched
0V
C
A
B
SOFT-START WAVEFORMS
R
A = ON, 5V/div
B = INPUT CURRENT, 100mA/div
C = V
SS
Pin Description
= 500k , C
OUT
, 2V/div
2.00ms/div
SS
= 0.1 F