MAX1765EUE Maxim Integrated Products, MAX1765EUE Datasheet - Page 17

• Manufacturer Part Number: MAX1765EUE
• Description: IC CONV 800MA LN W/REG 16-TSSOP
• Manufacturer: Maxim Integrated Products
• Type: Step-Up (Boost)r

Specifications of MAX1765EUE

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 2.5 ~ 5.5 V
• Current - Output: 800mA
• Frequency - Switching: 1MHz
• Voltage - Input: Adj down to 0.7V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP Exposed Pad, 16-eTSSOP, 16-HTSSOP
• Power - Output: 1.5W
• Output Voltage: 2.5 V to 5.5 V
• Output Current: 800 mA
• Switching Frequency: 1200 MHz
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Supply Current: 100 uA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Figure 8. Soft-Start, Reduced Current Limit
Table 3. Component Selection Guide
Table 4. Component Suppliers
Note: Please indicate that you are using the MAX1765 when
contacting these component suppliers.
Surface Mount
0.22µF
AVX
Coilcraft
Kemet
Motorola
Sumida
SUPPLIER
800mA, Low-Noise, Step-Up DC-DC Converter
PRODUCTION
C
SS
R
R
SS1
SS2
______________________________________________________________________________________
COUNTRY
Japan
Japan
REF
ISET
USA
USA
USA
USA
USA
MAX1765
Coilcraft DS3316P
Coilcraft LPT3305
3.3µH INDUCTORS
I
t
81-45-474-7030
81-3-3607-3302
LIM
SS
843-448-9411
847-639-6400
810-287-2536
408-629-4789
847-956-0666
=
= 1.25A
(R
PHONE
SS1
||
R
(
SS2
R
with 500mA Linear Regulator
SS1
)
R
C
SS2
+ R
SS
SS2
)
AVX TPS series
Kemet T510 series
Sanyo POSCAP series
where I
operating frequency (typically 1.2MHz), L is the induc-
tance of the chosen inductor, L
the chosen inductor, R
tances of the internal N-channel and P-channel,
respectively.
Table 5 lists the typical available output current when oper-
ating with one or more NiCd/NiMH cells or one Li+ cell.
A momentary pushbutton switch can be used to turn
the MAX1765 on and off (Figure 11). ONA is pulled low
and ONB is pulled high to turn the device off. When the
momentary switch is pressed, ONB is pulled low and
Figure 9. Soft-Start, Maximum Current Limit
I
I
D
RIPPLE
0.22µF
OUT MAX
CAPACITORS
=
LIM
,
V
OUT
=
is the peak inductor current limit, f
V
OUT
=
R
C
f
−
SW
SS
SS
1



V
I
IN
Adding a Manual Power Reset
LIM
+
×
+
I
−
D
LIM
L
I
LIM
I
RIPPLE
REF
ISET
×
(
NCH
R
2
[
PCH
V
×
MAX1765
IN
Motorola MBR0520L
Nihon EP10QY03
(
R

 −

and R
−
NCH
−
(
RESR
I
I D
LIM
SCHOTTKY DIODES
R
NCH
)
+
×
PCH
is the resistance of
L
(
R
ESR
)
I
t
500kΩ < R
LIM
SS
NCH
=
= 1.25A
R
are the resis-
)
SS
C
+
SS
SS
L
< 1MΩ
SW
ESR
is the
)
]
17