MAX1692EUB Maxim Integrated Products, MAX1692EUB Datasheet - Page 6

• Manufacturer Part Number: MAX1692EUB
• Description: IC REG PWM STEP-DN 5.5VIN 10UMAX
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck)r

Specifications of MAX1692EUB

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 1.25 ~ 5.5 V
• Current - Output: 600mA
• Frequency - Switching: 750kHz
• Voltage - Input: 2.7 ~ 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: Contains lead / RoHS non-compliant
• Other names: Q816058

Low-Noise, 5.5V-Input,
PWM Step-Down Regulator
Figure 1. Simplified Functional Diagram
6
PIN
10
_______________________________________________________________________________________
1
2
3
4
5
6
7
8
9
SYNC/
SHDN
PWM
GND
REF
FB
NAME
SYNC/
PGND
SHDN
PWM
GND
REF
LIM
BP
FB
LX
IN
RAMP
SYNC
REF
GEN
CELL
REF
PWM
Supply Voltage Input. Input range from +2.7V to +5.5V. Bypass with a 10µF capacitor.
Supply Bypass Pin. Internally connected to IN. Bypass with a 0.1µF capacitor. Do not connect to an
external power source other than IN.
Ground
1.25V, 1.2% Reference Output. Capable of delivering 50µA to external loads. Bypass with a 0.22µF capaci-
tor to GND.
Feedback Input
Current-Limit Select Input. Connect LIM to GND for 0.6A current limit or LIM to IN for 1.2A current limit.
Oscillator Sync and Low-Noise, Mode-Control Input.
An external clock signal connected to this pin allows for LX switching synchronization.
Active-Low, Shutdown-Control Input. Reduces quiescent current to 0.1µA. In shutdown, output becomes
high impedance.
Inductor Connection to the Drains of the Internal Power MOSFETs
Power Ground
SYNC/PWM = IN (Forced PWM Mode)
SYNC/PWM = GND (PWM/PFM Mode)
SLOPE COMPENSATION
ON
ON
PFM
COMPARATOR
PWM ON
120mV
12mV
SIGNAL
REF
FB
REF
FB
LIM COMPARATOR
PFM CURRENT COMPARATOR
40mV
PWM
COMPARATOR
OVERVOLTAGE
COMPARATOR
FUNCTION
NEGLIM
COMPARATOR
MAX1692
CONTROL AND
DRIVER LOGIC
5mV IN PFM
ADJ. IN PWM
SUPPLY
CHIP
Pin Description
0.1X
0.1X
SENSE FET
SENSE FET
10
1
1
P
N
BP
IN
LX
PGND