MAX1759EUB-T Maxim Integrated Products, MAX1759EUB-T Datasheet - Page 5

• Manufacturer Part Number: MAX1759EUB-T
• Description: Charge Pumps Buck/Boost Regulating
• Manufacturer: Maxim Integrated Products

Specifications of MAX1759EUB-T

• Function: Step Up, Step Down
• Output Voltage: 3.3 V, 2.5 V to 5.5 V
• Output Current: 100 mA
• Maximum Operating Temperature: + 85 C
• Package / Case: uMAX-10
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT

(Circuit of Figure 1, C
1
2
PIN
3, 4
10
CH1: V
CH2: V
1
2
5
6
7
8
9
R
LOAD
OUT
IN
LINE-TRANSIENT RESPONSE
= 33Ω
, 1V/div, AC-COUPLED
, 20mV/div, AC-COUPLED
NAME
SHDN
PGND
GND
POK
CXN
OUT
CXP
FB
IN
100µs/div
_______________________________________________________________________________________
IN
Open-Drain Power-OK Output. POK is high impedance when output voltage is in regulation. POK sinks current
when V
Ground POK or leave unconnected if not used. POK is high impedance in shutdown.
Shutdown Input. Drive high for normal operation; drive low for shutdown mode. OUT is high impedance in
shutdown.
Input Supply. Connect both pins together and bypass to GND with a ceramic capacitor (see Capacitor
Selection section).
Ground. Connect GND to PGND with a short trace.
Power Ground. Charge-pump current flows through this pin.
Negative Terminal of the Charge-Pump Transfer Capacitor
Positive Terminal of the Charge-Pump Transfer Capacitor
Power Output. Bypass to GND with an output filter capacitor.
Dual-Mode Feedback. Connect FB to GND for 3.3V output. Connect to an external resistor divider to adjust
the output voltage from 2.5V to 5.5V.
= 10µF, C
FB
falls below 1.1V. Connect a 10kΩ to 1MΩ pull-up resistor from POK to V
X
= 0.33µF, C
-4.2V
-2.5V
OUT
1
2
3
4
Typical Operating Characteristics (continued)
CH1: V
CH2: I
CH3: V
CH4: V
= 10µF, V
IN
OUT
POK
SHDN
, 200mA/div
TURN-ON/OFF RESPONSE
,1V/div
, 5V/div
, 5V/div
OUT
(V
500µs/div
IN
= 3.3V, V
= 4.2V)
Buck/Boost Regulating
Charge Pump in µMAX
FUNCTION
R
V
LOAD
IN
IN
= 4.2V
= 2.5V, T
= 33Ω
A
= +25°C, unless otherwise noted.)
1
2
3
4
CH1: V
CH2: I
CH3: V
CH4: V
IN
OUT
POK
SHDN
, 200mA/div
TURN-ON/OFF RESPONSE
,1V/div
, 5V/div
, 5V/div
Pin Description
OUT
(V
IN
500µs/div
for a logic signal.
= 2.5V)
R
V
LOAD
IN
= 2.5V
= 33Ω
5