Datasheet

1
65
10
2
3
74
8
9
FB
RC
COMP
DIS/EN
SS
GND
VDD
ISNS
GDRV
BP
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FB
RC
COMP
DIS/EN
SS
5
4
3
2
1
1
6
7
8
9
10
GND
VDD
ISNS
GDRV
BP
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TPS40210, TPS40211
SLUS772E –MARCH 2008– REVISED OCTOBER 2011 www.ti.com
DEVICE INFORMATION
TERMINAL FUNCTIONS
TERMINAL
I/O DESCRIPTION
NAME NO.
COMP 4 O Error amplifier output. Connect control loop compensation network between COMP pin and FB pin.
Disable pin. Pulling this pin high, places the part into a shutdown mode. Shutdown mode is characterized by
a very low quiescent current. While in shutdown mode, the functionality of all blocks is disabled and the BP
DIS/EN 3 I
regulator is shut down. This pin has an internal 1-MΩ pull-down resistor to GND. Leaving this pin
unconnected enables the device.
Error amplifier inverting input. Connect a voltage divider from the output to this pin to set output voltage.
FB 5 I
Compensation network is connected between this pin and COMP.
GDRV 8 O Connect the gate of the power N channel MOSFET to this pin.
GND 6 - Device ground.
Current sense pin. Connect an external current sensing resistor between this pin and GND. The voltage on
this pin is used to provide current feedback in the control loop and detect an overcurrent condition. An
ISNS 7 I
overcurrent condition is declared when ISNS pin voltage exceeds the overcurrent threshold voltage, 150 mV
typical.
Switching frequency setting pin. Connect a resistor from RC pin to VDD of the IC power supply and a
RC 1 I
capacitor from RC to GND.
Soft-start time programming pin. Connect capacitor from SS pin to GND to program converter soft-start time.
SS 2 I
This pin also functions as a timeout timer when the power supply is in an overcurrent condition.
BP 9 O Regulator output pin. Connect a 1.0-μF bypass capacitor from this pin to GND.
System input voltage. Connect a local bypass capacitor from this pin to GND. Depending on the amount of
VDD 10 I required slope compensation, this pin can be connected to the converter output. See Application Information
section for additional details.
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