Rainbow Electronics MAX15010 - Manual (Page 10)

MAX15008/MAX15010
Automotive 300mA LDO Voltage Regulators
with Tracker Output and Overvoltage Protector
10 ______________________________________________________________________________________
Pin Description
PIN
MAX15008 MAX15010
NAME FUNCTION
1, 2, 8, 11,
23, 24, 26,
27, 28, 31,
32
1, 2, 8,
10–13, 18,
23, 24, 26,
27, 28, 31,
32
N.C. No Connection. Not internally connected.
3 3 OUT_TRK
Tracker Output. Bypass OUT_TRK to SGND with a 10µF (min) capacitor with low ESR
(
≤ 1.5Ω).
4 4 ADJ
Tracker Amplifier Input. Connect ADJ to OUT_LDO or to an external source to track.
Alternatively, connect ADJ to REF to provide the reference voltage to the tracker.
5 5 SGND Signal Ground
6 6 PGND
Ground. PGND is also the return path for the overvoltage protector pulldown current for
the MAX15008. In this case, connect PGND to SGND at the negative terminal of the
bypass capacitor connected to the source of the external MOSFET. For the MAX15010,
connect PGND to SGND together to the local ground plane.
7 7 RESET
Active-Low Open-Drain Reset Output. RESET is low while OUT_LDO is below the reset
threshold. Once OUT_LDO has exceeded the reset threshold, RESET remains low for
the duration of the reset timeout period before going high.
9 9 CT
Reset Timeout Adjust Input. Connect a capacitor (C RESET ) from CT to ground to adjust
the reset timeout period. See the Setting the RESET Timeout Period section.
10 — FB_PROT
Overvoltage Threshold Adjustment Input. Connect FB_PROT to an external resistive
voltage-divider network to adjust the desired overvoltage threshold. Use FB_PROT to
monitor a system input or output voltage. See the Setting the Overvoltage Threshold
(MAX15008 Only) section.
12 — GATE
P r otector Gate D r i ve O utp ut. C onnect GATE to the g ate of an exter nal n- channel M OS FE T.
G ATE i s the outp ut of a char g e p um p w i th a 45µA p ul l up cur r ent to 7.1V ( typ ) ab ove IN
d ur i ng nor m al op er ati on. GATE i s q ui ckl y tur ned off thr oug h a 63m A i nter nal p ul l d ow n
d ur i ng an over vol tag e cond i ti on. G ATE then r em ai ns l ow unti l FB_P RO T has d ecr eased
96% b el ow the thr eshol d . GATE p ul l s l ow w hen E N _P RO T i s l ow .
13 — SOURCE
Output-Voltage Sense Input. Connect SOURCE to the source of the external n-channel
MOSFET.
14 14 REF 1.235V Voltage Reference Output. Bypass REF to SGND with a 1nF or larger capacitor.